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 130
... follows flow cleavage in Glenarm series and Conestoga lime- stone . 2. Central region . Peach Bottom , Peters Creek , etc. a . Granite dikes follow flow cleavage planes . b . Quartz veins follow flow and fracture cleavage planes . c ...
... follows flow cleavage in Glenarm series and Conestoga lime- stone . 2. Central region . Peach Bottom , Peters Creek , etc. a . Granite dikes follow flow cleavage planes . b . Quartz veins follow flow and fracture cleavage planes . c ...
Seite 134
... follow them . Joints of this type are called compression joints by some authors . Their origin is not fully understood . Shear zones which follow the same direction as longitudinal joints are found everywhere in the region . They vary ...
... follow them . Joints of this type are called compression joints by some authors . Their origin is not fully understood . Shear zones which follow the same direction as longitudinal joints are found everywhere in the region . They vary ...
Seite 159
... follow the contact between the Baltimore gneiss and Setters formation . A few pegmatite dikes occur within the gneiss core of the Woodstock dome , but these are mostly small . Several large dikes intrude the Wissahickon schist and ...
... follow the contact between the Baltimore gneiss and Setters formation . A few pegmatite dikes occur within the gneiss core of the Woodstock dome , but these are mostly small . Several large dikes intrude the Wissahickon schist and ...
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