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Full-Text Articles in Physical Sciences and Mathematics
Determining Fossil Woods (Western Conifers), George F. Beck
Determining Fossil Woods (Western Conifers), George F. Beck
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In this paper we come to consider the problem of the coniferous woods. One cannot always recognize with certainty that a given wood is a conifer, yet in ninety percent of the specimens recognition is simple.
Remarkable West American Fossil, The Blue Lake Rhino, George F. Beck
Remarkable West American Fossil, The Blue Lake Rhino, George F. Beck
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Bidding for acceptance as fact, and for its place in the sun of fame and notoriety, we come now to the newly discovered fossil rhino animal mold of Blue Lake in Grand Coulee, central Washington. Not that fossil rhinos are rare or that their abundance in the Tertiary of America has waited until the present for revelation, is this fossil important. The feature in the Blue Lake rhino which taxes our credulity is the existence of the thing in what unquestionably must pass as once liquid basaltic lava. That anything organic could pass through the terrific heat and pressure of …
Determination Of Fossil Woods (Part V-Beech-Sycamore-Alder), George F. Beck
Determination Of Fossil Woods (Part V-Beech-Sycamore-Alder), George F. Beck
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The group of woods considered in this paper are only superficially alike—no implication that they are closely related is intended. The beginner will almost certainly confuse the compound rays of these various woods with their annual rings.
Formations Of The Columbia Basin, Parade Of Extinct Mammals, George F. Beck
Formations Of The Columbia Basin, Parade Of Extinct Mammals, George F. Beck
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In this preliminary chart are shown the extinct mammals encountered as fossils in the various formations among and above the great Columbia Basalt series of the Pacific Northwest. A few shown as appearing in the Lake Vantage horizon of the basalts.
Determination Of Fossil Woods (Part Iv-Walnut-Hickory-Persimmon), George F. Beck
Determination Of Fossil Woods (Part Iv-Walnut-Hickory-Persimmon), George F. Beck
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These three woods undoubtedly ranged over Western America in Tertiary and were well represented in the Ginkgo series of forest during Miocene. Fossil walnut wood is the more abundant of the three species, while hickory is not common.
Determination Of Fossil Woods (Part Iii-The Elms), George F. Beck
Determination Of Fossil Woods (Part Iii-The Elms), George F. Beck
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The elms are among the best known and most beloved trees found native to America. Like the redwood they belong to that large group of trees which in preglacial days grew generally over the northern hemisphere.
Camels Of The Columbia Plateau, George F. Beck
Camels Of The Columbia Plateau, George F. Beck
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However foreign they may seem to us the camels are one of our oldest American stocks. Our Western plains once supported large herds of them, humped and humpless, large and small, giraffe-necked and normal-necked. For some 35 million years, from Oligocene to the Pliocene, the camels were confined to North America and it was not until recently, geologically speaking that we shared the race with the Old World.
Determination Of Fossil Woods (Part Ii-The Oaks), George F. Beck
Determination Of Fossil Woods (Part Ii-The Oaks), George F. Beck
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The oaks, unlike the sacred ginkgo or temple tree, are thriving throughout the northern hemisphere today. Not only is the oak an entirely familiar and abundant element in existing landscapes, but its history goes back into the centuries and ages. Its leaves and woods are generously represented in fossil forests as far back as the early Tertiary and closely allied forms penetrate as far back as the Cretaceous.