geosyncline|geosynclines in English

noun

downward curve of the Earth's surface (Geology)

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1. These lands were the source of thick clastic sediments which accumulated in the geosynclines.

2. The Alpine orogeny caused extensive folding and faulting of Mesozoic and early Tertiary sediments from the Tethys geosyncline.

3. Beltian Geosyncline, a linear trough in the Earth’s crust in which rocks of Precambrian age (about 4 billion to 542 million years ago) were deposited in the Northern Rocky Mountain region

4. During latest Precambrian time, in northwest Mexico, an about 2,000 m thick sequence of conglomerate, sandy shale and dolomite, containingCollenia, Cryptozoa and other organisms, accumulated on top of the eroded older Precambrian metamorphics and granitic rocks, that formed the northeast flank of the miogeosynclinal part of the ancestral North American Cordilleran Geosyncline, representing a near-shore facies.