proterozoic in English
No rock standard has been identified formally as marking the base; at the top of the Proterozoic the Cambrian - Precambrian boundary is identified on the basis of fossils.
Use "proterozoic" in a sentence
1. Proterozoic Anorthosites were emplaced during the Proterozoic Eon (ca
2. Algonkian definition, Proterozoic (def
3. What does Algonkian mean? Late Proterozoic
4. 24 The early Precambrian in Jilin province includes the Archaeozoic granite-greenstone belt, early Proterozoic Ji'an Group and mid Proterozoic Laoling Group .
5. 5 Probably formed in Early Proterozoic, it was rejuvenated repeatedly in late stage.
6. As well, a regionally pervasive electrical anisotropy throughout the crust crosses Proterozoic tectonic boundaries and is aligned in many areas with the regional tectonic fabric (as expressed by aeromagnetic data) created during the final stages of Proterozoic tectonic assembly of western Laurentia.
7. Algonkian A Precambrian system ( Van Eysinga, 1975) of equivalent time period to the Proterozoic
8. The country rock of the orebody are dolomites of Gaoyuzhuang Formation ( Middle Proterozoic era ) .
9. 26 ChronologyThe data of chronology explanates that both of them are belong to Proterozoic Era.
10. 15 The country rock of the orebody are dolomites of Gaoyuzhuang Formation ( Middle Proterozoic era ) .
11. Ancient Cratons were formed during the Precambrian, mostly by the start of the late Proterozoic
12. 8 Late Archean and Early Proterozoic were the main period for the formation of continental crust.
13. 16 The ore bed hosts in boracic granulite of Lieryu formation, Liaohe group of lower proterozoic.
14. Lead isotopic compositions of galena within the Spanish Mine metamorphic suite indicate additional Proterozoic activity and mineralization.
15. 25 According to analysis of sedimentary characters and geochemistry characters of Luanchuan Group of New Proterozoic Era.
16. 13 The middle Proterozoic crystalline schist series in the Panzhihua - Xichang region has undergone progressive regional metamorphism.
17. 4 Proterozoic is feral planting often is to grow in crows, rarely and insect pests is invaded.
18. Beltian definition is - of or relating to a division of Proterozoic geologic era in North America region.
19. 10 Before Later Proterozoic era , in this area more than two times of thermodynamic metamorphism took place.
20. 30 Wengquangou boron - iron deposit occurred within the rocks of Lieryu Formation in Liaohe Group, early Proterozoic.
21. The Cambrian period lies between the Ediacaran period at the end of the Proterozoic eon and the Ordovician period, …
22. Amphibolite: Geologic age: Cambrian/Late Proterozoic: Lithologic constituents: Major Metamorphic > Amphibolite (Amphibolite) Amphibolite - equigranular, massive to well foliated
23. 12 The early Proterozoic atmosphere and hydrosphere are similar to those of Archaeozoic in being still absent in oxygen.
24. The Archean is a geologic eon before the Proterozoic Eon, before 2.5 Ga (billion years), or 2,500 million years ago.
25. 6 The mother rock derived form Archaean and Early Proterozoic metamorphic rock from the north-east part of Ordos Basin.
26. Beresite (2) metasomatism (2) mineral deposits, genesis (2) Paleozoic Ordovician Lower Ordovician (1) Precambrian upper Precambrian Proterozoic Neoproterozoic Riphean upper Riphean
27. 19 They indicate that the Archeozoic tectonic environment is continental nucleus development and crustal block formation, and the Early Proterozoic t...
28. 20 A simulation experiment was made on kerogen from shales in the lower Xiamalin Formation of the Proterozoic in North China.
29. 3 The Proterozoic climate was still warm and wet, but compared with that of the Archaeozoic Eon, the temperature fell a little.
30. 27 Boron deposits of eastern Liaoning occur in a suite of Early Proterozoic metamorphic rocks, with boron orebodies existent in magnesian marble.
31. 22 In the end, the relation between the metallogenesis and the evolution of Archaeozoic and Early Proterozoic earth crust is discussed basing upon the theory of rift.
32. 2 The Qinling Group of Lower Proterozoic is an advantageous environment for metallogenesis and the ductile shear zone is a major structure to control rocks and ores.
33. The Altaid orogenic collage hosts numerous gold, silver, copper–molybdenum, lead–zinc, and nickel deposits of Late Proterozoic to Early Mesozoic age
34. At its northernmost extent, the unconformity in fact removed all of the Pahrump, and the Noonday rests directly on the Proterozoic Complex.
35. 29 Various hydrocarbon migration paths towards these special reservoirs involve unconformable surface, fault surface, s4 and s3 sandstones, and Proterozoic interior laminar formation.
36. Sphere is Archearl (>2.5 Ga); however, most of the unexposed basement and some exposed basement overlying the tectosphere are Early Proterozoic [Hoffman, 1990]
37. The country rocks are of Archaean age in the eastern block, and in the western block they are of Lower Proterozoic age (Trans-Amazonian Event).
38. Usually, Archean Anorthosites are more Ca-rich than Proterozoic ones (e.g., in the Laramie Mountains, Wyoming, or the Adirondack Mountains, New York), which verifies below.
39. The great span of Precambrian time is divided for convenience into two major parts—the Archean Eon (4,550-2,500 million years [or Ma]) and the Proterozoic Eon (2,500-570 Ma)
40. Within the belt , the mid-late Proterozoic (epimetamorphic) green- schists were ovethrust from south to north onto the late Paleozoic granitic batholith at a low angle.
41. 7 Since the Middle Proterozoic, metazoan trace fossils must have undergone an irreversible evolution from simple to complicated,[www.Sentencedict.com] and from lower to higher in quality.
42. 1 The metallogenic ages are the lower and upper Proterozoic Subera, late and earlier Palaeozoic Era, Mesozoic Era, with Devonian Period as an important metallogenic era.
43. English: The Archean (also spelled Archaean, formerly called the Archaeozoic, also spelled Archeozoic) is a geologic eon before the Proterozoic, ending 2500 Ma (million years ago).
44. 21 They indicate that the Archeozoic tectonic environment is continental nucleus development and crustal block formation, and the Early Proterozoic tectonic environment is represented as rift.
45. 17 Dense Au deposit zone is located in the suture between Archaeozoic Zhongchao ancient land plate and Proterozoic Mongoliasea plate , controlled by NW Fuerhe and Gudonghe lithosphericfractures.
46. 14 Professional advice and on-the-job training was provided to two field parties working on late Proterozoic volcanic-ophiolite-granite rocks in the South-eastern desert.
47. 28 Dating from the Eocene Epoch, the crater is likely less than 50 million years old, but the impact bored into Proterozoic sandstones well over 500 million years old.
48. 9 In recent years, Proterozoic and Archaeozoic buried hill reservoirs have been explored and developed in Liaohe Oilfield, but it is a problem to interpret these fracture-cavity reservoirs.
49. 18 In the research area, the primary surface formation are the Archeozoic — Proterozoic Jiaonan group there are kinds of Clastic rocks and Volcanic rocks in the metamorphite and Mesozoic Cretaceous.
50. 23 Paleo-microphytes of the study area include 20 genera and 33 kinds, the characteristic fossils and the fossil assemblages could be correlated to that of Middle Proterozoic in Jixian County nearby.