 Wide bands of a sedimentary, slate-like rock, composed of varying admixtures of volcanic ash and land waste, have the greatest areal extent. Intercalated with these occur strips and lenses of acid and basic volcanic rocks, represented by fine- and coarse-grained...  Bulletin - Seite 26von North Carolina. Division of Mineral Resources, North Carolina. Department of Conservation and Development - 1910Vollansicht - Über dieses Buch
 | 1909 - 1162 Seiten
...lenses of acid and basic volcanic rocks, represented by tine and coarse-grained volcanic ejectamenta and old lava flows. The acid rocks include fine tuffs,...with flows of rhyolite and dacite. The basic series embrace fine tuffs, coarse tuffs, and breccias of an andesitic nature, and flows of an andesitic and... | |
 | 1909 - 632 Seiten
...represented by tine and coarse-grained volcanic ejectamenta and old lava flows. The acid rocks include tine tuffs, coarse tuffs, and breccias, chiefly of a rhyolitic...with flows of rhyolite and dacite. The basic series embrace fine tuffs, coarse tuffs, and breccias of an audesitic nature, and flows of an andesitic and... | |
 | North Carolina. Department of Conservation and Development - 1916 - 376 Seiten
...land waste, have the greatest areal extent. Intercalated with these occur strips and lenses of acid and basic volcanic rocks, represented by fine- and...Gabbro and diabase dikes cut the other formations. "The region has suffered a period of severe dynamic matamorphism or mashing, consequent upon a great... | |
 | 1917 - 244 Seiten
...land waste, have the greatest areal extent. Intercalated with these occur strips and lenses of acid and basic volcanic rocks, represented by fine- and...Gabbro and diabase dikes cut the other formations. "The region has suffered a period cf severe dynamic matamorphism or mashing, consequent upon a great... | |
 | 1917 - 380 Seiten
...land waste, have the greatest areal extent. Intercalated with these oceur strips and lenses of acid and basic volcanic rocks, represented by fine- and...The acid rocks include fine tuffs, coarse tuffs, and breceias, chiefly of a rhyolitic and dacitic character; together with flows of rhyolite and dacite.... | |
 | Virginia. Division of Mineral Resources - 1925 - 762 Seiten
...land waste, have the greatest areal extent. Intercalated with these occur strips and lenses of acid and basic volcanic rocks, represented by fine- and...Gabbro and diabase dikes cut the other formations. "The region has suffered a period of severe dynamic matamorphism or mashing, consequent upon a great... | |
 | Virginia Division of Mineral Resources - 1925 - 706 Seiten
...land waste, have the greatest areal extent. Intercalated with these occur strips and lenses of acid and basic volcanic rocks, represented by fine- and...Gabbro and diabase dikes cut the other formations. "The region has suffered a period of severe dynamic matamorphism or mashing, consequent upon a great... | |
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