A mafic dyke is a mass of rock generated in either sedimentary or igneous terrain and intrudes pre-existing cracks. It was common to see many enormous swarms the southern granulitic landscape made up archean rocks. Dykes tend be younger than surrounding body. Generally, dolerite has an ophitic texture medium fine grained. In study area country rocks petrographical microscope, XRD, FE-SEM techni...

Abstract Background Three stages of basalt weathering are known: early or incipient weathering, intermediate and advanced weathering. The Late Oligocene Gebel Qatrani in Fayum Depression, Egypt, shows signs particularly exhibited spheroids found at the top flow. present paper gives results detailed petrographical, mineralogical geochemical study these spheroids. Results core-stones composed phe...

Abstract This paper presents organic geochemical evidence pointing to the occurrence of wildfire events at Triassic–Jurassic boundary in Central Iran. The studied outcrop section (the Kamarmacheh Kuh section) is comprised Upper Triassic Nayband Formation which passes conformably into Lower Jurassic Ab-e-Haji with no sharp boundary. Organic petrographical studies reveal a higher concentration se...