ライフサイエンスコーパス: Precambrian

1 s, and their fossil record dates back to the Precambrian.

2 raw inferences about aerobiosis in the early Precambrian.

3 of carbon cycle perturbations unique to the Precambrian.

4 elongated sinuous grooves or furrows in the Precambrian.

5 re, climate, and evolution of animals in the Precambrian.

6 t determination of the lunar distance in the Precambrian.

7 fixation, especially towards the end of the Precambrian.

8 s been approximately constant since the late Precambrian.

9 vely high Na+ concentrations during the Late Precambrian [544 to 543 million years ago (Ma)], Permian

10 l to understanding the prokaryote-dominated, Precambrian 85% of life's history, can require more than

11 us conditions persisted throughout the later Precambrian, and were even a feature of Phanerozoic ocea

12 of the enigmatic Ediacaran biota of the late Precambrian as giant protists.

13 used to trace the evolution of oxygen in the Precambrian atmosphere and to document past volcanic eru

14 een used to trace the redox evolution of the Precambrian atmosphere and to document the photochemistr

15 that likely contributed to the deposition of precambrian banded iron formations, globally important s

16 ediment input derived from south Greenland's Precambrian bedrock terranes, probably reflecting the ce

17 thern Sudan follows a contorted path through Precambrian bedrock.

18 mats was not carbon-limited during the early Precambrian, but became carbon-limited as the supply of

19 d in terms of the greater sensitivity of the Precambrian carbon cycle to the loss of shallow-water en

20 Stable oxygen isotope ratios (delta(18)O) of Precambrian cherts have been used to establish much of o

21 find that the H2 production potential of the Precambrian continental lithosphere has been underestima

22 our estimate of H2 production rates from the Precambrian continental lithosphere of 0.36-2.27 x 10(11

23 xplorations of saline fracture waters in the Precambrian continental subsurface have identified envir

24 se environments to account for the fact that Precambrian crust represents over 70 per cent of global

25 Here we examine results from an expanded Precambrian database of palaeomagnetic intensity measure

26 can explain the lack of secular trend in the Precambrian delta(13)C record, and reopens the possibili

27 he potential for attaining new insights into Precambrian ecosystems and the composition of Earth's ea

28 duals, but nothing was known of the possible Precambrian evolution of comparable microorganisms until

29 ch bilaterian metazoans might have arisen in Precambrian evolution.

30 thousands of carbon isotope analyses of late Precambrian examples have been published to correlate th

31 The Precambrian explosion led to the rapid appearance of mos

32 Northward-flowing segments follow Precambrian fabrics, whereas east-west segments follow f

33 the dominant dipolarity of the time-averaged Precambrian field, a crucial requirement for palaeomagne

34 Precambrian genes exhibit a more pronounced difference i

35 omologs in invertebrate and protist genomes (Precambrian genes) with those that do not have such dete

36 For more than 100 years, the "missing Precambrian history of life" stood out as one of the gre

37 vidence an opportunistic response to the mid-Precambrian increase of environmental oxygen that result

38 ils within rocks of non-marine origin in the Precambrian is exceedingly rare.

39 atic stepwise increase in oxygen in the late Precambrian is widely considered a prerequisite for the

40 ion of photosynthesizing communities on late Precambrian land surfaces.

41 The natural history of Precambrian life is still unknown because of the rarity

42 rall, these results support the notions that Precambrian life was thermophilic and that proteins can

43 pens a new window through which to view late Precambrian life.

44 hree billion years of pervasively microbial 'Precambrian' life, and on the other the modern 'Phaneroz

45 in South Africa yields a contribution of the Precambrian lithosphere to global H2 production that was

46 thout significantly modifying the underlying Precambrian lithosphere.

47 cross the GOE provides new insights into the Precambrian marine cycling of this critical micronutrien

48 on points based on the interpretation of the Precambrian microbial fossil record, and strict molecula

49 -Ga Gunflint biota is one of the most famous Precambrian microfossil lagerstatten and provides a key

50 The existence of a terrestrial Precambrian (more than 542 Myr ago) biota has been large

51 ce reconstruction analysis targeting several Precambrian nodes in the evolution of class-A beta-lacta

52 concentrations seem to have been elevated in Precambrian oceans.

53 as well as the low preservation potential of Precambrian organisms (see Primer by Butterfield, in thi

54 Some of the enigmatic Precambrian organisms in the Ediacaran Period grew large

55 f methane using sulphate, was limited in the Precambrian period by low sulphate concentrations in sea

56 Ediacaran sclerites is evidence against any 'Precambrian prelude' to the explosive diversification of

57 Here, we use resurrected Precambrian proteins as scaffolds for protein engineerin

58 ical potential of laboratory resurrection of Precambrian proteins, as both high stability and enhance

59 e interior of East Antarctica is a mosaic of Precambrian provinces affected by rifting processes.

60 and new H2 concentration data obtained from Precambrian rocks and find that the H2 production potent

61 , and delta(36)S from sulfide and sulfate in Precambrian rocks indicate that a change occurred in the

62 so eliminates the only known occurrence of a Precambrian sedimentary carbonate with highly (13)C-depl

63 Their detection in the Precambrian sedimentary record would then permit an inde

64 setting, mineralogy, and geologic history of Precambrian sedimentary rocks indicates that the Fe isot

65 evolution during the earlier and much longer Precambrian segment of geological time centred on prokar

66 n the Timmins, Ontario, area of the Canadian Precambrian Shield.

67 nt, varying from 95 +/- 4 kilometers beneath Precambrian shields and platforms to 81 +/- 2 kilometers

68 largely interpreted from the fossils of the Precambrian soft-bodied Ediacara Biota.

69 not least multiple examples of Cambrian and Precambrian soft-bodied fossils.

70 s to the micritic microstructures typical of Precambrian stromatolites.

71 ons of Laurentia and other landmasses in the Precambrian supercontinent of Rodinia are controversial.

72 The implied history of Precambrian tidal friction is in accord with both the mo

73 ercontinent centres can be located back into Precambrian time, providing fixed points for the calcula

74 ciation ("snowball Earth" conditions) during Precambrian time.

75 prompts re-evaluation of the significance of Precambrian trace fossils as evidence of the early diver

76 traces bear a remarkable resemblance to the Precambrian trace fossils, including those as old as 1.8

77 ications for MOR hydrothermal systems in the Precambrian, when low-seawater SO4 could help explain lo

78 as the increasing ocean oxygen levels in the Precambrian, which are thought to have influenced the em