The National Geographic Magazine, Volume 94National Geographic Society, 1948 - Geography Indexes kept up to date with supplements. |
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Page 213
... rock garden ? " he asked . " This is known as a riffle , " I explained . " Usually the rocks are wet instead of just damp . " I stood up in the rear of Baby Blue , an aluminum canoe , to see if the riffle had a " slick , " an opening in ...
... rock garden ? " he asked . " This is known as a riffle , " I explained . " Usually the rocks are wet instead of just damp . " I stood up in the rear of Baby Blue , an aluminum canoe , to see if the riffle had a " slick , " an opening in ...
Page 284
... rock about one inch in diameter . This rock was plainly igneous - crystallized from a molten condition , like granite and many other familiar rocks . Geologists call this rock olivine gabbro . The core above the rock was not the usual ...
... rock about one inch in diameter . This rock was plainly igneous - crystallized from a molten condition , like granite and many other familiar rocks . Geologists call this rock olivine gabbro . The core above the rock was not the usual ...
Page 291
... Rock dredging on the north slope of the gorge in 1,700 fathoms ( about 2 miles ) pro- duced a wonderful haul - some 400 pounds of rock and clay . The clay was not a typical ocean - bottom deposit but contained many angular fragments ...
... Rock dredging on the north slope of the gorge in 1,700 fathoms ( about 2 miles ) pro- duced a wonderful haul - some 400 pounds of rock and clay . The clay was not a typical ocean - bottom deposit but contained many angular fragments ...
Contents
Allen Arthur | ix |
Abu Ali Mansur Anuchtakin elAmri | x |
American Masters in the National Gallery By John Walker With 24 color reproductions | xiii |
Copyright | |
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