地层尖灭

地层尖灭（pinch-out）是指沉积岩层向盆地边缘，逐渐减薄厚度直至消失的现象^[1] 向陆源方向的地层消失，是因为沉积空间减少，沉积物颗粒较粗。向盆地中心方向的地层消失，是因为沉积物减少。沉积物颗粒较细。^[2]根据地层尖灭点的沉积物颗粒，可推断沉积物的陆源方向。若地层尖灭点层层向陆源方向推进造成上超，向盆地中心推进造成下超^[3]

参考文献

^ Glossary of Geology, 5th Edition (American Geological Institute)
^ Boggs Jr (2014) Principles of Sedimentology and Stratigraphy. dc.identifier.isbn 1292021284 (https://lib.hpu.edu.vn/handle/123456789/28988 （页面存档备份，存于互联网档案馆）)
^ Gary Nichols,(2009) Sedimentology and Stratigraphy,Wiley-Blackwell ISBN 1405193794, 9781405193795)

[Glossary-1] Glossary of Geology, 5th Edition (American Geological Institute)

[”Boggs”-2] Boggs Jr (2014) Principles of Sedimentology and Stratigraphy. dc.identifier.isbn 1292021284 (https://lib.hpu.edu.vn/handle/123456789/28988 （页面存档备份，存于互联网档案馆）)

[”Gary”-3] Gary Nichols,(2009) Sedimentology and Stratigraphy,Wiley-Blackwell ISBN 1405193794, 9781405193795)

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