ライフサイエンスコーパス: basalt

1 the pyroxenitic remnants of recycled oceanic basalt.

2 mpared to control plant-soil systems without basalt.

3 olving the oxidation and hydration of glassy basalt.

4 ues previously measured in a mid-ocean-ridge basalt.

5 ng siderite formed in experiments with flood basalt.

6 elieved to have fed the eruption of the SLIP basalts.

7 subduction-related signatures of gabbros and basalts.

8 al composition to one influenced by alkaline basalts.

9 h particles during the eruptions of the CAMP basalts.

10 distinguishable from that of mid-ocean ridge basalts.

11 -may strongly affect the generation of flood basalts.

12 seawater-derived fluids in ocean ridge flank basalts.

13 xplain the 186Os-187Os signatures of oceanic basalts.

14 l trends from nephelinites to alkali olivine basalts.

15 s volatile and degasses from erupted oceanic basalts.

16 es and higher water content of plume-derived basalts.

17 and isotopic similarities to mid-ocean-ridge basalts.

18 trations of ocean island and mid-ocean-ridge basalts.

19 tral Atlantic Magmatic Province (CAMP) flood basalts.

20 iverse compositions recorded in ocean island basalts.

21 for understanding helium isotopes in erupted basalts.

22 o the +0.1 per thousand shift of terrestrial basalts.

23 s the upper-mantle source of mid-ocean-ridge basalts(1).

24 onvective mantle provided by mid-ocean-ridge basalts(11), consistent with subducted nitrogen being ad

25 Leaching experiments on mare basalt 14053 demonstrate that isotopically light Zn cond

26 easurements of late-stage apatite from lunar basalt 14053 that document concentrations of H, Cl and S

27 arth's continental crust (11-13) compared to basalts (15-16).

28 HC-III was abundant in basalt (36%) but absent in chalk; HC-IV was prevalent in

29 but absent in chalk; HC-IV was prevalent in basalt (46.5%) but was low (20%) in chalk.

30 a bright basal reflection as the Timber Hill Basalt (~6 Ma) or related flow, is consistent with a lat

31 C and PCO2 = 280 bar on a Mg-rich tholeiitic basalt (9.3 wt % MgO and 12.2 wt % CaO) composed of oliv

32 The Pleistocene Alma basalt abuts the Cretaceous Senonian Kerem Ben Zimra cha

33 even individual eruptions during past flood basalt activity was probably severe.

34 light Zn condensates also occur on some mare basalts after their crystallization, confirming a volati

35 tween the extinction horizon and lowest CAMP basalts allows this sedimentary Hg excursion to be strat

36 er cent to 30 per cent melting of the Coucal basalts along high geothermal gradients (of more than 70

37 The weathering of basalts also triggered the Sturtian glaciation, which ac

38 existence of microbes that are supported by basalt alteration is lacking.

39 Basalt alteration reactions are theoretically capable of

40 control region and ATP6 in 28 mole rats from basalt and in 14 from chalk habitats.

41 d simulations of model basalt, hydrous model basalt and near-MORB to assess the effects of iron and w

42 report that most modern-day mid-ocean ridge basalt and ocean island basalt samples as well as contin

43 nto the surface environment by weathering of basalt and other magmatic rocks, at copper liberation ra

44 We propose instead that high mid-ocean-ridge basalt and plume delta(15)N values may both be dominantl

45 k between vertical amphitheater headwalls in basalt and rapid erosion during megaflooding due to the

46 carbon cycling and chemical exchange between basalt and sea water.

47 of Martian meteorites, analogue terrestrial basalts and analogue terrestrial sedimentary rocks.

48 ched crustal rock compositionally similar to basalts and average martian crust measured by recent Rov

49 der of magnitude relative to mid-ocean ridge basalts and contain two Cl-bearing components with eleva

50 (66)Zn between bulk silicate Earth and lunar basalts and crustal rocks, the volatile loss likely occu

51 ically and texturally similar to terrestrial basalts and cumulates, except that they have higher conc

52 d the chlorine isotope composition of Apollo basalts and glasses and found that the range of isotopic

53 ally more treefall occurred on high-nutrient basalts and in lowland catena areas.

54 lar to primitive terrestrial mid-ocean ridge basalts and indicate that some parts of the lunar interi

55 e compositions intermediate between those of basalts and komatiites.

56 o the behavior of Mg isotopes in terrestrial basalts and mantle rocks, Mg isotopic data on lunar samp

57 chlorine and bromine relative to terrestrial basalts and martian meteorites; sulphur, chlorine and fe

58 n (3)He/(4)He ratios between mid-ocean-ridge basalts and ocean island basalts, as well as high concen

59 tion of the interface between Columbia River basalts and other geological formations indicates that m

60 r samples show isotopic variations among the basalts and pristine anorthositic rocks reflecting isoto

61 lavas are more oxidized than mid-ocean-ridge basalts and subduction introduces oxidized components in

62 res in volcanic glass from Cenozoic seafloor basalts and the corresponding titanite replacement micro

63 ry of the valence state of Fe in primary arc basalts and their mantle sources.

64 fficacy of the approach when undertaken with basalt, and its potential co-benefits for agriculture, r

65 contrast in MgO content between peridotite, basalt, and sediment makes direct mixing between sedimen

66 ater than those in metamorphosed terrestrial basalts, and can retain it at greater depths within Mars

67 tantial decreases in mantle melt fraction in basalts, and in indicators of deep crustal melting and f

68 the trace-element composition of the Coucal basalts, and propose that these rocks were themselves de

69 the upper mantle sampled by mid-ocean-ridge basalts, and that buoyantly upwelling plumes from the de

70 global environmental change than their flood basalt- and/or dike-dominated counterparts.Although the

71 re as the possible source of Mid-Ocean Ridge Basalts- and Ocean Island Basalts- type magmatic rocks f

72 o pristine Mg-suite rocks (72415 and 76535), basalts, anorthosites, breccias, mineral separates, and

73 Flood basalts appear to form during the initiation of hotspot

74 e spectrum of 4He/3He ratios in ocean island basalts appears to preserve the mantle's depletion histo

75 nges in hydration that were greater for mare basalts (approximately 70%) than for highlands (approxim

76 equestration in established sediment-covered basalt aquifers on the Juan de Fuca plate offer promisin

77 karyotic cell abundances on seafloor-exposed basalts are 3-4 orders of magnitude greater than in over

78 implying that Mg isotope variations in lunar basalts are consistent with their origin by remelting of

79 Lunar mare basalts are depleted in F and Cl by approximately an ord

80 Olivine basalts are observed on crater floors and in layers expo

81 Basalts are recognized as one of the major habitats on E

82 High 3He/4He ratios found in ocean island basalts are the main evidence for the existence of an un

83 composition resulting from the weathering of basalts, as reflected in the chemical compositions at Ma

84 4He/3He peak found in modern mid-ocean-ridge basalts, as well as estimates of the initial 4He/3He rat

85 een mid-ocean-ridge basalts and ocean island basalts, as well as high concentrations of (3)He and (40

86 trusion, mixing and mobilization of coal and basalt, ascent to the surface, explosive combustion, and

87 (CRB) represent the largest volume of flood basalts associated with the Yellowstone hotspot, yet the

88 presence of jarosite combined with residual basalt at Meridiani Planum indicates that the alteration

89 ion of the extinction with the Siberia flood basalts at approximately 250 Ma is well known, and recen

90 try implies the presence of young, weathered basalts at the site at the time of the impact.

91 low-temperature, high-pressure metamorphosed basalts (blueschists) from subduction zones and in low-g

92 t constraints on the sources of ocean-island basalts, but two very different models have been put for

93 pths, and the composition of mid-ocean ridge basalts can all be used to determine variations in mantl

94 s that the radiogenic osmium in ocean-island basalts can better be explained by the source of such ba

95 (40)Ar in the mantle source of ocean island basalts, can be explained within the framework of differ

96 tified a homologous recombinant mtDNA in the basalt/chalk studied area.

97 ly, all the fine-grained material is alkalic basalt, chemically identical (except for sulphur, chlori

98 Global correlations of mid-ocean-ridges basalt chemistry, axial depth and crustal thickness have

99 f clastic rocks of moderately altered alkali basalt composition, enriched in some highly volatile ele

100 Using experiments on a lunar basalt composition, we confirm that carbon dissolves as

101 of mantle composition that rely on inverted basalt compositions alone.

102 consistent with known lunar anorthosite and basalt compositions.

103 ic matter and waters that circulated through basalts, constitutes an attractive prebiotic substrate.

104 Icelandic and northeast Atlantic basalts contain variable proportions of two enriched com

105 an better be explained by the source of such basalts containing a component of recycled crust.

106 e the source of kimberlites and ocean island basalts contains a long-lived component that formed by m

107 w that the martian crust, while dominated by basalt, contains a diversity of igneous materials whose

108 se that the rapid rise of continental alkali basalts correlates with an abruptly decreasing degree of

109 Fractures and pores in basalt could provide substantial pore volume and surface

110 The Columbia River basalts (CRB) represent the largest volume of flood basa

111 , we report analyses of two 3.56-Gy-old mare basalts demonstrating that they were magnetized in a sta

112 l analysis of explosive eruption of coal and basalt, demonstrating that it is a viable mechanism for

113 traction from the mantle and mid-ocean-ridge basalt differentiation.

114 Host-basalt dissolution releases nutrients and energy sources

115 pyroclastic eruptions are not known from the basalt-dominated British Palaeogene Igneous Province (BP

116 release of methane from fluid inclusions in basalt during aeolian erosion.

117 s of this reservoir contributed to the flood basalt emplaced on Baffin Island about 60 million years

118 ry and that >1.1 million cubic kilometers of basalt erupted in ~750,000 years.

119 shed data from the Etendeka and Parana flood basalts erupted at the initiation of the hotspot track.

120 ed by volatilization of metal halides during basalt eruption--a process that could only occur if the

121 l correlation between some continental flood basalt eruptions and mass extinctions has been proposed

122 The impact of these flood basalt eruptions on the global atmosphere and the coeval

123 een magma and coal during the Siberian flood-basalt eruptions released large amounts of CO2 and CH4 i

124 the Triassic-Jurassic boundary during flood basalt eruptions.

125 es during the SCR-Northern Nevada Rift flood basalt event both in space and time.

126 ution and carbonation reactions in fractured basalts exposed to CO2-acidified fluids.

127 These basalts extend the known range of rock compositions comp

128 with diverse magma flux within several flood basalts extending over tens of million years.

129 km wide on the transition, although extruded basalts flow more than 100 km from the rift.

130 The Central Atlantic Magmatic Province basalt flows along the eastern seaboard of the United St

131 ls indicate that last-gasp eruptions of thin basalt flows continued until less than 1.0 Gyr ago, but

132 unt to the SE of Hawaii Island, and in older basalt flows when Kilauea and its sister Hawaiian shield

133 2 per mille more depleted in delta(18)O than basalt flows.

134 ts are in low abundance and large volumes of basalt flushing through the crust from depth overprint t

135 s a viable alternative to models of alkaline basalt formation by melting of recycled oceanic crust wi

136 e of CO(2) injected into chemically reactive basalt formations but could also be adapted for long-ter

137 Basalt formations could enable secure long-term carbon s

138 Injection into basalt formations provides unique and significant advant

139 Injection into deep-sea basalt formations provides unique and significant advant

140 face rocks on Mars are dominantly tholeiitic basalts formed by extensive partial melting and are not

141 Steel coupons and basalt fragments were added to the cement paste in order

142 esults from a laboratory experiment in which basalt from Mount Etna volcano (Italy) was deformed and

143 Here we show that mid-ocean ridge basalts from 2,000 km along the southeast Indian ridge (

144 We report analyses of iron isotopes in basalts from Kilauea Iki lava lake, Hawaii.

145 Some basalts from large igneous provinces may provide tempora

146 phides from 20-million-year-old ocean island basalts from Mangaia, Cook Islands (Polynesia), which ha

147 Basalts from the Earth and the Moon do indeed appear to

148 a notable range in lithium isotope ratios in basalts from the East Pacific Rise, which correlate with

149 dstones, shales, carbonates, evaporites, and basalts from the Frio, In Salah, Illinois Basin, Decatur

150 Here we show that basalts from the largest volcanic event in geologic hist

151 ium- and platinum-group element data set for basalts from the Moon establishes that the basalts have

152 r-Nd-Pb isotope ratios and trace elements in basalts from the spreading axis, we show that the sparse

153 re of the enriched mantle I (EM I) source of basalts from, for example, Pitcairn or Walvis Ridge has

154 ratios of vesicles in mid-ocean ridge (MOR) basalt glass together with the ratios of high-temperatur

155 all titanite-based textures in metamorphosed basalt glass, but a cautious and critical evaluation of

156 n of bioalteration trace fossils in Cenozoic basalt glasses and their putative equivalents in Paleoar

157 Through a global survey of mid-ocean ridge basalt glasses, we show that mantle oxidation state vari

158 Basalt, granite, and quartz (53-250 um) were deployed in

159 d tent) and seven natural mineral particles (basalt, granite, hematite, magnetite, mica, milky quartz

160 for dikes and lavas from the Columbia River Basalt Group (16-15 Ma) in the western USA, and document

161 ngold Formation sediments, and the weathered basalt group.

162 isms, which constitute a trophic base of the basalt habitat, with important implications for deep-sea

163 ost other ocean island basalts, the Terceira basalt has a (210)Pb deficit, which we attribute to 8.5

164 -resolution eruption timeline for the Deccan basalts has prevented full assessment of their relations

165 high (3)He/(4)He ratios observed in oceanic basalts have been considered the main evidence for a 'pr

166 High (3)He/(4)He ratios in some basalts have generally been interpreted as originating i

167 Primary arc and mid-ocean ridge basalts have identical Cu contents, indicating that the

168 r basalts from the Moon establishes that the basalts have uniformly low abundances of highly sideroph

169 degrees N) and around Hawaii reveal that the basalt-hosted biosphere harbours high bacterial communit

170 in, and the Sandy Hook basin offer promising basalt-hosted reservoirs with considerable potential for

171 functional theory-based simulations of model basalt, hydrous model basalt and near-MORB to assess the

172 emical exchange between seawater and oceanic basalt in hydrothermal systems at midocean ridges (MOR).

173 rial environments slightly before the oldest basalts in eastern North America but simultaneous with t

174 F, S and Cl) contents of the most primitive basalts in the Moon-the lunar volcanic glasses.

175 the ca. 3.47 billion-year-old (Ga) Mount Ada Basalt, in the Pilbara Craton, Western Australia.

176 s and Li/Y ratios similar to mid-ocean ridge basalts, indicating that the subducting slab has limited

177 ts from variations in the movement of molten basalt into and out of the Yellowstone volcanic system.

178 imarily related to variations in the flux of basalt into the crust, rather than variations in their c

179 or every 1 km along strike, 360-400 km(3) of basalt is extruded, while 540-600 km(3) is intruded into

180 The average loss tangent of mare basalts is estimated at 0.0040-0.0061.

181 ause the volatile content of mid-ocean-ridge basalts is generally too low to produce the gas fraction

182 nd whether it has contributed to other flood basalts is not known.

183 ized nature of island arc vs. midocean-ridge basalts is related to the subduction of material oxidize

184 upper mantle, as sampled by mid-ocean ridge basalts, is highly depleted in incompatible elements, su

185 terion valid for low viscosity melts such as basalt, kimberlite and carbonatite.

186 eading to the toppling and transportation of basalt lava columns.

187 and other geochemical attributes in oceanic basalts less than 20 years old to infer that melts of th

188 n the timing and magnitude of Columbia River basalt magmatism, as well as the surface uplift and exis

189 ions are at odds with pressures derived from basalt major-element barometers(7) and geophysical measu

190 e similar in inferred mineral composition to basalt mapped from orbit.

191 rface areas sequestered more carbon per unit basalt mass than powder with low surface area.

192 y suggesting that such ultramafic (picritic) basalts may be relatively common.

193 These basalts may be the remnants of a thick (more than 35 kil

194 Mare basalts may contain hydrogen-rich apatite, but lunar mag

195 wn, and recent evidence suggests these flood basalts may have mobilized carbon in thick deposits of o

196 al for excess industrial silicate materials (basalt mine overburden, concrete, and iron and steel sla

197 na Kea are more oxidized than midocean ridge basalt (MORB) magmas, suggesting that the upper mantle s

198 in Yellowstone compared with mid-ocean ridge basalt (MORB) samples, this confirms that the deep plume

199 ement process of the Pacific mid-ocean ridge basalt (MORB)-type mantle by the Indian MORB-type mantle

200 ogenic isotope variations in mid-ocean ridge basalts (MORB) are commonly attributed to compositional

201 element (CSE) contents than mid-ocean ridge basalts (MORB).

202 Chemical differences between mid-ocean ridge basalts (MORBs) and ocean island basalts (OIBs) provide

203 We also find that mid-ocean-ridge basalts (MORBs) have (238)U/(235)U ratios higher than do

204 basalts (OIBs) compared with mid-ocean-ridge basalts (MORBs) have been used as evidence for the exist

205 up to sixfold higher than in mid-ocean ridge basalts (MORBs).

206 resent the mantle residue of mid-ocean-ridge basalts (MORBs).

207 ample-return sites and is a new type of mare basalt not previously sampled, but consistent with remot

208 at probably formed via aqueous alteration of basalt of the ancient cratered terrain.

209 raphy hence providing a minimum age of these basalts of 251.64 +/- 0.11 Ma.

210 Unlike typical tholeiitic basalts of oceanic plateaus, the 1.2 km vertical submari

211 ra Terrane, Western Australia, low-magnesium basalts of the Coucal Formation at the base of the Pilba

212 Furthermore, the intrusions cut basal basalts of the Taimyr lava stratigraphy hence providing

213 high-(3)He/(4)He signatures in ocean island basalts (OIB) erupted at volcanic hotspots derive from d

214 ungsten isotope data for modern ocean island basalts (OIB) from Hawaii, Samoa, and Iceland reveal var

215 The isotopic diversity of oceanic island basalts (OIB) is usually attributed to the influence, in

216 Although many ocean island basalts (OIBs) are argued to contain a recycled componen

217 enic xenon ((129)Xe/(130)Xe) in ocean island basalts (OIBs) compared with mid-ocean-ridge basalts (MO

218 n much lower eruption rates for ocean island basalts (OIBs) in comparison with those of lavas from la

219 ocean ridge basalts (MORBs) and ocean island basalts (OIBs) provide critical evidence that the Earth'

220 3He/4He ratios in many ocean-island basalts (OIBs) that erupt at hotspot volcanoes, such as

221 significantly in sequence: quartz, granite < basalt, olivine, limestone < gabbro.

222 Sediment-covered basalt on the flanks of mid-ocean ridges constitutes mos

223 the degassing of reduced carbon from Fe-rich basalts on planetary bodies would produce methane-bearin

224 Using CSE data for oceanic plateau basalts (OPB), which rarely degas S, we show that many O

225 We determine that the Martian basalt pebbles have been carried tens of kilometres from

226 nt is important for studies of ore deposits, basalt petrogenesis, and precious metal geology, mineral

227 n in filled vugs and veins within the plains basalts; positive correlations between magnesium, sulphu

228 e element-depleted source of mid-ocean ridge basalts, possibly as a result of a global differentiatio

229 as a CDR technique compatible with spreading basalt powder on acidic loamy soils common across millio

230 Packed beds of basalt powder with large specific surface areas sequeste

231 lt extraction) common to most oceanic island basalts, previously called PREMA (prevalent mantle) or F

232 Isotope compositions of basalts provide information about the chemical reservoir

233 an unequivocal link between an onshore flood basalt province, continental break-up and a hot-spot tra

234 tested this model for the Deccan Traps flood basalt province, which, along with the Chicxulub bolide

235 ion of dikes and sills of the Columbia River Basalt Province.

236 ute one of Earth's largest continental flood basalt provinces, whose eruption played a role in the Cr

237 ols caused by eruptions of continental flood basalt provinces.

238 ing, compatible and incompatible elements in basalts record gradually decreasing mantle melt fraction

239 s and the upper-mantle source of ocean-ridge basalts reflect isolation of plume sources from the conv

240 elevated (56)Fe/(54)Fe ratio of terrestrial basalts relative to chondrites was proposed to be a fing

241 new global data compilation of ocean island basalts, representing upwelling 'plumes' from the deep m

242 -partitioning during incipient weathering of basalt, rhyolite, granite and schist depends on the acti

243 In situ pH measurements for a basalt rock-CO(2)-brine system were conducted under GCS

244 easurements on the 3.7-billion-year-old mare basalt sample 10020.

245 d trace elements when compared to a standard basalt sample with known concentrations.

246 incorporated by segmenting an actual reacted basalt sample, and these results were compared to equiva

247 -day mid-ocean ridge basalt and ocean island basalt samples as well as continental crustal rocks goin

248 Five different basalt samples were immersed in water equilibrated with

249 amarium-neodymium isotope data for six lunar basalts show that the bulk Moon has a 142Nd/144Nd ratio

250 he present-day mantle, as sampled by oceanic basalts, shows large chemical and isotopic variability b

251 /m(2) ) of relatively coarse-grained crushed basalt significantly increased the yield (21 +/- 9.4%, S

252 ave resulted from explosive interaction with basalt sills of the Siberian Traps.

253 ate that the Pacific and Indian upper mantle basalt source domains were each affected by different me

254 anism for generating Os isotope diversity in basalt source regions.

255 l content than in the modern mid-ocean-ridge basalt source.

256 er stepped altar platforms and use of pecked basalt stones associated with the late 'Oro cult.

257 mal erosion, indicate emplacement in a flood-basalt style, consistent with x-ray spectrometric data i

258 oble gas isotope systematics of ocean island basalts suggest the existence of primordial mantle signa

259 high (3)He/(4)He ratios in some ocean-island basalts suggest the presence of relatively undegassed an

260 th as well as the eruption of McKinney Butte Basalt, suggesting widespread canyon formation following

261 s have identical Zn/Fe(T) to mid-ocean-ridge basalts, suggesting that primary mantle melts in arcs an

262 es exhibit a range of compositions including basalt, syenite, andesite, and a soil.

263 e/(4)He ratios identified in mid-ocean-ridge basalts that form by melting the upper mantle (about 8Ra

264 e and partial melting to become ocean island basalt, the HIMU source formed as Archean-early Proteroz

265 isotope (186Os-187Os) signatures in oceanic basalts, the possibility of material flux from the metal

266 Like most other ocean island basalts, the Terceira basalt has a (210)Pb deficit, whic

267 Converting basalt to more felsic compositions requires a second ste

268 thways for the chemical reaction of CO2 with basalt to produce stable and nontoxic (Ca(2+), Mg(2+), F

269 n influence the overall ability of fractured basalt to sequester carbon.

270 otope compositions reported for ocean island basalts to date.

271 als whose range in composition from picritic basalts to granitoids rivals that found on the Earth.

272 lution produced compositions from low-silica basalts to high-silica dacite in the Syrtis Major calder

273 Basalts to the west of the boundary display affinities t

274 plication of crushed silicate rocks, such as basalt, to croplands and forested landscapes.

275 Yield increases resulted from the basalt treatment after 120 days without P- and K-fertili

276 stment Strategy for Asthma in the Long Term (BASALT) trial was conducted by the Asthma Clinical Resea

277 of Mid-Ocean Ridge Basalts- and Ocean Island Basalts- type magmatic rocks found in the southern Tyrrh

278 hase assemblage expected to crystallize from basalt under lower-mantle conditions.

279 We demonstrate that the abrasion of basalt under present day Martian rates of aeolian erosio

280 e stratigraphically tied to a specific flood basalt unit, strengthening the case for volcanic Hg as t

281 Here we report the structure of molten basalt up to 60 GPa by means of in situ X-ray diffractio

282 housand), than the canonical mid-ocean ridge basalt value of -6.0 per thousand.

283 ence of a very large bolide impact and flood basalt volcanism near the boundary.

284 constraints on the age and duration of flood basalt volcanism within the Central Atlantic Magmatic Pr

285 oincidence between this extinction and flood basalt volcanism, existing geochronologic dates have ins

286 The overall carbonation kinetics of the basalt was enhanced by a factor of ca. 40.

287 weathering of granite, rhyolite, schist and basalt was rock-specific and regulated by ecosystem comp

288 illing into 3.5-million-year-old subseafloor basalt, we demonstrated the presence of methane- and sul

289 ing phase equilibria modelling of the Coucal basalts, we confirm their suitability as TTG 'parents',

290 If degassing of basalts were responsible for the rise in oxygen, it requ

291 tween deep mantle plumes and mid-ocean-ridge basalts, which is best explained by addition of a chondr

292 gin of the Steens-Columbia River (SCR) flood basalts, which is presumed to be the onset of Yellowston

293 the proposed impact site and that postimpact basalts wholly cover it.

294 Glass tubes packed with grains of olivine or basalt with different grain sizes and compositions were

295 edicts a petrogenetic sequence for the flood basalt with sources of melt starting from the base of th

296 Malad Gorge, Idaho, a canyon system cut into basalt with three remarkably distinct heads: two with am

297 Rocks are olivinerich basalts with varying degrees of dust and other coatings.

298 ive to 226Ra occur in normal mid-ocean ridge basalts, with the largest deficits in the most magnesium

299 epleted source for high 3He/4He ocean island basalts would resolve the apparent discrepancy in the re

300 as injected into several deep Columbia River Basalt zones near Wallula, Washington.