Report, Band 10Johns Hopkins Press, 1918 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. 14 (1941) |
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Seite 66
... rocks which are to - day entirely without , or with only slight traces of former life , are referred to the first great division of geological history called Archean Time . These oldest rocks are largely crystalline in character , so ...
... rocks which are to - day entirely without , or with only slight traces of former life , are referred to the first great division of geological history called Archean Time . These oldest rocks are largely crystalline in character , so ...
Seite 103
... crystalline rocks , confined for the most part to the Piedmont region between the Monocacy and the Chesapeake , have afforded the most varied mineral products . Here occur the most important building stones ; the slates of Delta and ...
... crystalline rocks , confined for the most part to the Piedmont region between the Monocacy and the Chesapeake , have afforded the most varied mineral products . Here occur the most important building stones ; the slates of Delta and ...
Seite 112
... crystalline lime- stones , of the western portion of the Piedmont Plateau in ... Rock , " of southern Frederick County . It has been used as a decorative ... rock is composed are imbedded in a red , ferruginous cement , and the stone ...
... crystalline lime- stones , of the western portion of the Piedmont Plateau in ... Rock , " of southern Frederick County . It has been used as a decorative ... rock is composed are imbedded in a red , ferruginous cement , and the stone ...
Seite 114
... crystalline rocks of the Piedmont Plateau have been found to carry gold in Maryland , Virginia , North Carolina , and Georgia . The gold occurs in quartz veins , which occupy the old lines of fracture in the rocks . Gold was first ...
... crystalline rocks of the Piedmont Plateau have been found to carry gold in Maryland , Virginia , North Carolina , and Georgia . The gold occurs in quartz veins , which occupy the old lines of fracture in the rocks . Gold was first ...
Seite 147
... crystalline rocks , how- ever , often appearing at the surface . The underlying Potomac clays and the ancient rocks of gneiss or gabbro outcrop at the higher levels , along the slopes of the hills and in the stream valleys MARYLAND ...
... crystalline rocks , how- ever , often appearing at the surface . The underlying Potomac clays and the ancient rocks of gneiss or gabbro outcrop at the higher levels , along the slopes of the hills and in the stream valleys MARYLAND ...
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Häufige Begriffe und Wortgruppen
30 feet Allegany County Anne Arundel County Aquia Average elevation Baltimore beds beneath the surface Blue Ridge Calvert Capacity of reservoir carried to reservoir Cecil County Chesapeake Bay Choptank City Clark Hoshall Coastal Plain Creek Cretaceous crystalline rocks Cumberland Curtis Bay Daily consumption Delaware deposits Diameter district Downin drilled Eastern Shore Elevation above source elevation above town Eocene feet beneath feet deep feet in depth Fire hydrants flow formation Frederick gallons per minute Garrett County Geological glauconite gneiss gravel gray Hagerstown Hard head inches iron limestone lower Magothy Mary's Maryland Matawan miles Miocene Mountain Municipality Nanjemoy Patapsco Patuxent peneplain Percentage of population Piedmont Plateau Pleistocene population supplied Potomac River Prince George's County Public supply sand sandstone sandy clay shales shallow Soft southern Sparrows Point springs streams SURFACE WATERS surface yields UNDERGROUND WATERS Upper valleys Washington water horizons Waterworks western Wicomico Worcester County