cratonic वाक्य
उदाहरण वाक्य
मोबाइल
- The first large cratonic landmasses formed during the Archean eon.
- Culmination of the cratonic collision resulted in the foreland sedimentary Padbury Basin.
- There have been six cratonic sequences since the beginning of the Tejas.
- The blocks in the northern part of the island are made up of Archean cratonic material.
- The core of the Iberian Peninsula consists of a Hercynian cratonic block known as the Iberian Massif.
- Accordingly, cratonic mantle roots are probably composed of buoyantly subducted tectonic thickening by collisions, or destruction by sediment subduction.
- The area includes Aravalli range, Son-Narmada-Tapti lineament, Godavari and Mahanadi valleys and South Cratonic Belts.
- Commonly, migmatites occur within extremely deformed rocks that represent the base of eroded mountain chains, typically within Precambrian cratonic blocks.
- Cratonic sequences were first proposed by Lawrence Sloss in 1963; each one represents a time when unconformities eroded when the seas receded.
- From Cambrian to Mississippian time, the Fort Worth Basin area was part of a stable cratonic shelf with deposition dominated by carbonates.
- Some of the oldest rocks on earth have been found in the African Cratonic Basement rocks of ages in excess of 2 billion years.
- Continental lithosphere is typically ~ 200 km thick, though this varies considerably between basins, mountain ranges, and stable cratonic interiors of continents.
- The host rocks for the intrusions are middle Proterozoic granites and gneiss and the complex was associated with the Cambrian rifting of the cratonic rocks.
- Ur can, nevertheless, be half a billion years younger than Vaalbara, but the concepts of these two early cratonic assemblages are incompatible.
- Attempts to identify equivalent cratonic sequences on other continents have met with only limited success, suggesting that eustasy is unlikely to be the sole responsible mechanism.
- It marks the progressive submergence of this landmass by a shallow cratonic sea and its burial by shallow marine sediments of the Cambrian-Early Ordovician Sauk sequence.
- Mantle tomography shows that cratons are underlain by anomalously cold mantle corresponding to lithosphere more than twice the typical thickness of mature oceanic or non-cratonic, continental lithosphere.
- Several plate tectonic reconstructions propose an Archean-Paleoproterozoic connection between the cratonic core of North America, the continent Laurentia, and that of Siberia, the continent paleomagnetic evidence.
- Some microcontinents are fragments of Gondwana or other ancient cratonic continents : Newfoundland for example are within the continental shelves of their adjacent continents, separated from the mainland by inland seas flooding its margins.
- The synchroneity and extent of the Tokwe Segment is considered strong evidence supporting a predominantly intra-cratonic origin for the Late Archaean greenstone belts of Zimbabwe and refuting an arc accretion origin for the craton.
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