Report, Band 13John Hopkins Press, 1937 CONTENTS.--Vol. I (1897)--Vol. II (1898)--Vol. III (1899)--Vol. IV (1902)--Vol. V (1905)--Vol. VI (1906)--Vol. VII (1908)--Vol. VIII (1909)--Vol. IX (1911)--Vol. X (1918)--Vol. XI (1922)--Vol. XII (1928)--Vol. XIII (1937)--Vol. XIV (1941) |
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Seite 30
... rocks and formed the rocks which we observe today , and since we know that the original rocks have undergone changes and have been subjected to intense heat and pressure through millions of years during the earth's history , it becomes ...
... rocks and formed the rocks which we observe today , and since we know that the original rocks have undergone changes and have been subjected to intense heat and pressure through millions of years during the earth's history , it becomes ...
Seite 30
... rocks and formed the rocks which we observe today , and since we know that the original rocks have undergone changes and have been subjected to intense heat and pressure through millions of years during the earth's history , it becomes ...
... rocks and formed the rocks which we observe today , and since we know that the original rocks have undergone changes and have been subjected to intense heat and pressure through millions of years during the earth's history , it becomes ...
Seite 36
Maryland Geological Survey. STRUCTURES IN IGNEOUS ROCKS GENERAL STATEMENT Igneous rocks have once been hot and molten and have been intruded into higher portions of the earth's crust or poured out over its surface . They have been ...
Maryland Geological Survey. STRUCTURES IN IGNEOUS ROCKS GENERAL STATEMENT Igneous rocks have once been hot and molten and have been intruded into higher portions of the earth's crust or poured out over its surface . They have been ...
Inhalt
Page | 19 |
Preface | 25 |
Primary Elements in Igneous Rocks of the Piedmont | 37 |
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abundant amphibolite amygdules anticlines aplite axes of folding axis Baltimore gabbro Baltimore gneiss banding bedding biotite Bridge Chattolanee dome Chesapeake chlorite cleavage planes Conowingo Dam County Creek cross joints Crosswicks clay crystals deformation Delaware Deposit granodiorite complex diagrams dikes direction east Englishtown Englishtown sand epidote exposures fault feet feldspar flow cleavage flow lines flow structures foliation fossils fracture cleavage gabbro geologic Glenarm Glenarm Series grains granite porphyry granodiorite hornblende igneous rocks inclusions intrusive Jersey lamprophyre linear structures localities marble Marshalltown Marshalltown formation Maryland massive metamorphism metamorphosed mile minerals Mount Laurel Mount Laurel sand northeast occur orientation parallel pegmatite Piedmont planar Plate pluton Port Deposit Port Deposit granodiorite primary quarry quartz diorite quartzite recrystallization region relation schist schistosity sediments Setters formation shear specimen strike Susquehanna River syncline Towson dome transect unconformity Upper Cretaceous volcanics wall rock Wissahickon schist Woodstock dome