The National Geographic Magazine, Volumes 76-77National Geographic Society, 1940 - Geography Indexes kept up to date with supplements. |
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Page 769
... mountains ? There's Obsidian Cliff , of black volcanic glass . There's Sulphur Mountain ; and Roaring Mountain , named for the steam vents near its top . And in the awed accounts of the early trappers the present - day visitor ...
... mountains ? There's Obsidian Cliff , of black volcanic glass . There's Sulphur Mountain ; and Roaring Mountain , named for the steam vents near its top . And in the awed accounts of the early trappers the present - day visitor ...
Page 785
... Mountain tumbled the huge gray blocks about in senseless fury . The rocks are of travertine , deposited in preglacial times by hot springs like those now at work farther down this strange mountain ( page 786 and below ) . JUPITER ...
... Mountain tumbled the huge gray blocks about in senseless fury . The rocks are of travertine , deposited in preglacial times by hot springs like those now at work farther down this strange mountain ( page 786 and below ) . JUPITER ...
Page 790
... Mountain , hot springs are bringing lime in solution from limestone beds 1,200 to 1,500 feet down and depositing it on the outside in the form of travertine ( calcium carbonate ) . This light porous rock builds up fast - six inches to a ...
... Mountain , hot springs are bringing lime in solution from limestone beds 1,200 to 1,500 feet down and depositing it on the outside in the form of travertine ( calcium carbonate ) . This light porous rock builds up fast - six inches to a ...
Contents
Home Life and Industry in the Netherlands II illustrations in duotone from photographs | 271 |
History of Ancient Bridge Building and Road Making | 347 |
Italys Monuments Tell Romes Magnificence 8 illustrations from photographs 7 illus | 371 |
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