Syneclise

a very gently sloping depression in the earth’s crust within a platform. The structure has irregular roundish or oval contours; diameters range to several hundred km and sometimes exceed 1,000 km. Depths are usually 3 to 5 km. Syneclises are formed over a long period of time (hundreds of millions of years), with comparatively minor changes in contour. Sediments are thicker and geologic columns are more complete at the center of a syneclise than at the periphery, where the columns are characterized by numerous hiatuses in sedimentation. Syneclises often develop over aulakogenes and often consist of separate depressions complicated by arches.

单词	syneclise
释义	Syneclise Syneclise a very gently sloping depression in the earth’s crust within a platform. The structure has irregular roundish or oval contours; diameters range to several hundred km and sometimes exceed 1,000 km. Depths are usually 3 to 5 km. Syneclises are formed over a long period of time (hundreds of millions of years), with comparatively minor changes in contour. Sediments are thicker and geologic columns are more complete at the center of a syneclise than at the periphery, where the columns are characterized by numerous hiatuses in sedimentation. Syneclises often develop over aulakogenes and often consist of separate depressions complicated by arches.
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