منابع مشابه
Gneiss domes and gneiss dome systems
Various mechanisms have been proposed for the dynamic cause and kinematic development of gneiss domes. They include (1) diapiric fl ow induced by density inversion, (2) buckling under horizontal constriction (i.e., extension perpendicular to compression), (3) coeval orthogonal contraction or superposition of multiple phases of folding in different orientations, (4) instability induced by vertic...
متن کاملPrecambrian Quartzo - Feldspathic Gneiss from the Herman
Precambrian quartzo-feldspathic gneiss was encountered at an elevation of —3616 feet in the Herman 1A well drilled in southeastern Erie County, Ohio, by the Amerada Petroleum Corporation. The five samples of this gneiss that were studied exhibit varying degrees of gneissose foliation. In order of decreasing abundance, microcline, plagioclase, quartz, and biotite together account for an average ...
متن کاملSurgery in ancient Mesopotamia.
Many medical and therapeutic cuneiform texts have been recovered from sites in ancient Mesopotamia, but no specifically surgical text has yet been found. Although it is possible that surgical texts may be found in the future, it is rather unlikely. Their absence cannot be taken as proof that the ancient Mesopotamians did not practise surgery; it is probable that surgical techniques were handed ...
متن کاملMesopotamia Neo - Assyrian Period
No collection of laws from the iNeo-Assyrian period is known to us. If a text of this kind had ever existed, it seems highly likely that it would have been part of Assurbanipal's famous library in Nineveh. But neither in Nineveh nor in twenty-three excavated sites located in different parts of the empire have archaeologists have succeeded in unearthing so much as a fragment of such a text. In a...
متن کاملFrom quartz hazard to quartz risk: the coal mines revisited.
Following the classification of quartz as a human carcinogen by the IARC, many standard-setting committees are currently trying to convert this hazard into their national or EU standards. Since human data to set a safe exposure limit for quartz are limited, we hypothesized that lung burden data on quartz in coal miners' lungs after lifetime exposure could be used to set a non-carcinogenic lung ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geological Magazine
سال: 1922
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s0016756800109525