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 33
... Pegmatite and Aplite dikes Hornblende Lamprophyre dikes Granite Porphyry Pegmatite and Aplite dikes Port Deposit Granodiorite Post Lower Ordo- vician Hornblende Granodiorite with quartzdiorite Hornblende Granodiorite Relay Quartz ...
... Pegmatite and Aplite dikes Hornblende Lamprophyre dikes Granite Porphyry Pegmatite and Aplite dikes Port Deposit Granodiorite Post Lower Ordo- vician Hornblende Granodiorite with quartzdiorite Hornblende Granodiorite Relay Quartz ...
Seite 158
... pegmatite dikes occur throughout the gneiss complex and overlying crystalline formations although the larger dikes appear to be confined to certain areas . Pegmatites vary in size from small stringers and isolated lenses to large dikes ...
... pegmatite dikes occur throughout the gneiss complex and overlying crystalline formations although the larger dikes appear to be confined to certain areas . Pegmatites vary in size from small stringers and isolated lenses to large dikes ...
Seite 159
... Pegmatite dikes are particularly abundant in the easily permeable mica schist of both the Setters and Wissahickon formations which have lent themselves to pegmatitic solu- tions . Here the dikes formed are nearly always concordant ...
... Pegmatite dikes are particularly abundant in the easily permeable mica schist of both the Setters and Wissahickon formations which have lent themselves to pegmatitic solu- tions . Here the dikes formed are nearly always concordant ...
Inhalt
The Application of Recent Structural Methods in the Interpretation | 27 |
General Statement | 49 |
Types and Manner of Producing folds | 55 |
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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 microscope 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