Paleozoic gneissic granitoids are an important lithologic component of the Shoo Fly Complex of the central Sierra Nevada, California. Field relations, petrographic, and geochemical studies indicate that the gneisses were originally intruded as a seri.es of plutons ranging from gabbro (oldest) to granite and granodiorite (median age) to syenite (youngest) with the granitoid types predominating. ...

This article analyzes the key controlling factors and hydrocarbon distribution rules of lithologic reservoirs in a continental downfaulted basin according to structural features, sedimentary evolution, types facies, source rock diagenesis reservoir formation mechanisms, exploration status, resource potential. The results show that three major (sandbody types, effective rocks, reservoirs) one co...

Triassic strata are widely developed in the eastern part of Sichuan Basin. The Mingyuexia anticline and Huangnitang located structural belt develop Jialingjiang Formation to Xujiahe Formation. middle Leikoupo Badong on both sides synchronous heterogeneous strata. They distinguished regionally according their different sedimentary environments lithologic characteristics, phase transition boundar...

We present a detailed geologic study of the Thebes Formation at Gebel Gurnah in its locus typicus on the West Bank (opposite Luxor) of the Nile River in the Upper Nile Valley, Egypt. This is the first detailed measurement and lithologic description of the ~340 m thick (predominantly) carbonate section. The Thebes Formation is divided into thirteen major lithic units (A to M). We interpret data ...