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وبلاگ بزرگ مقالات زمین شناسی

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Introduction to Structural Geology (1-19-98)

	Structural Geology is primarily the study of mountain belts		Undeformed strata of the Grand Canyon
	Facing indicators--dune crossbeds		Pillow basalts
	Angular unconformity		Folded strata in the Alps
	Thrust fault in the Alps		Thrust fault in the Catkills
	Strike-slip fault in California		Striations on fault surface
	Satellite image of the Appalachians

Primary Structures (1-30-98)

	Sedimentary layering		Fossils can be useful facing, paleoenvironmental, and age indicators
	Modern mud cracks		Silurian mud cracks
	Modern dune crossbeds		Jurassic dune crossbeds in Zion NP
	Graded beds--more facing indicators		Sole marks--facing and current indicators
	Pillow basalts can be useful facing indicators

Unconformities & Contacts (2-2-98)

	Hutton's angular unconformity at Siccar Pt., Scotland		The "Taconic unconformity," Catskill NY
	Near-vertical angular unconformtiy, French Alps		Non-conformity--Triassic dolostone over crystalline basement, French Alps
	Tectonic contact: indicated by striations on surface		Tectonic contact: slickensides
	Tectonic contact: indicated by offset		Tectonic contact: indicated by fault gouge

Joints & Fractures (2-9-98)

Exfoliation joints--Half Dome

Tension gashes--left lateral movement

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+ نوشته شده در جمعه 1387/09/08ساعت 18:44 توسط علی فاضلی |