نتایج جستجو برای: pyroclastic units
تعداد نتایج: 172732 فیلتر نتایج به سال:
Roshtkhar Iron deposit is located in southeast of Khorasan Razavi Province about 48 Km east of Roshtkhar. This deposit is geologically located in the northeast of the Lut block in the Khaf-Bardaskan volcanic- plutonic belt. Intermediate igneous rocks such as stock, dyke, lava and pyroclastic deposits are host rock. Igneous rocks are dioritic porphyry, monzosyenitic porphyry, andesite, basalt an...
Abstract Pyroclastic density currents are hazardous, ground-hugging, hot mixtures of gas and solid particles produced by volcanoes. Currents generated the largest explosive eruptions have traveled distances on order 100 km, their devastating impact has repeatedly marked Earth's geologic history. We show that pyroclastic from super-eruptions during Oligocene in Great Basin United States had exce...
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