The New Encyclopaedia Britannica: A - K.Encyclopaedia Britannica, 2005 |
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Page 259
... Eocene Green River Shales of Colorado , Wyoming , and Utah are potentially rich petroleum sources and are undergoing exploratory extrac- tion . Bituminous layers of the Early Permian Irati Shales of Brazil are similarly important ...
... Eocene Green River Shales of Colorado , Wyoming , and Utah are potentially rich petroleum sources and are undergoing exploratory extrac- tion . Bituminous layers of the Early Permian Irati Shales of Brazil are similarly important ...
Page 264
... Eocene age ( i.e. , formed 57.8 to 36.6 million years ago ) . This vast deposit contains fossils and sedi- mentary structures , suggesting rapid deposition and burial of unoxidized organic matter in shallow lakes or marine embayments ...
... Eocene age ( i.e. , formed 57.8 to 36.6 million years ago ) . This vast deposit contains fossils and sedi- mentary structures , suggesting rapid deposition and burial of unoxidized organic matter in shallow lakes or marine embayments ...
Page 309
... Eocene formations ( 57.8 to 36.6 million years old ) . Snails had their adaptive radiation early in geologic history . Living genera of marine , freshwater , and land snail families are known from Oligocene to Miocene deposits ( 36.6 to ...
... Eocene formations ( 57.8 to 36.6 million years old ) . Snails had their adaptive radiation early in geologic history . Living genera of marine , freshwater , and land snail families are known from Oligocene to Miocene deposits ( 36.6 to ...
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albite amphiboles ancient aragonite areas atoms basalt bivalves body calcite calcium called carbonate central centre century cephalopods chemical clay minerals colour common composition contain crust crystals ctenidia cult cultural deities deposits developed dolomite Earth economic eggs electron evaporite example existence facies feldspar Figure garnet gastropods goddess gods grains Hittite human igneous rocks important industrial kaolinite king known layers limestone magma magnetic major mantle cavity marine material mental metamorphic rocks metaphysics Mexican Mexico City mica Michelangelo microscope millimetres Milton mimicry mind Mineralogy modern Molière Mongolia Mongols Moscow myth nature object occur ocean olivine organic originally oxide percent period philosophers physical plagioclase political population pressure produced properties pyroxene quartz reaction region religion religious reprinted result sandstones sedimentary rocks sediments shell silicate smectite snails society species structure Sumerian surface temperature temple tetrahedrons texture tion typically United urban volcanic