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 60
... closely spaced as in slate , or farther apart as in gneiss , or schist . They may be due to rock texture ; that is , mineral arrangement , or caused by closely spaced fractures and they can occur in almost any rock at any time under ...
... closely spaced as in slate , or farther apart as in gneiss , or schist . They may be due to rock texture ; that is , mineral arrangement , or caused by closely spaced fractures and they can occur in almost any rock at any time under ...
Seite 74
... closely related structures and indicate a direction of flowage but in different rocks . With reference to the coordinate system cross joints may con- veniently be called ac joints because they are parallel to that direction . As a rule ...
... closely related structures and indicate a direction of flowage but in different rocks . With reference to the coordinate system cross joints may con- veniently be called ac joints because they are parallel to that direction . As a rule ...
Seite 134
... closely related to the emplacement of the mass . Certain flat joints which are independent of surface topography are also primary . Secondary joints were formed after consolidation of the pluton . They are widely distributed , very ...
... closely related to the emplacement of the mass . Certain flat joints which are independent of surface topography are also primary . Secondary joints were formed after consolidation of the pluton . They are widely distributed , very ...
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