. The dinosaur book : the ruling reptiles and their relatives. Dinosaurs; Reptiles, Fossil. money that are allotted to him; consequent- ly the results obtained by most fossil ex- peditions are fairly consistently satisfactory. Having picked a region for exploratory work, the fossil hunter follows a definite and systematic procedure for ferreting out the dinosaurs, or fishes, or phytosaurs, or mammals, or whatever he may be after. First, by a method of trial and error, he learns just which levels or "horizons" in the rock layers are the fossil-bearing ones. Then he "walks out&quo
. The dinosaur book : the ruling reptiles and their relatives. Dinosaurs; Reptiles, Fossil. money that are allotted to him; consequent- ly the results obtained by most fossil ex- peditions are fairly consistently satisfactory. Having picked a region for exploratory work, the fossil hunter follows a definite and systematic procedure for ferreting out the dinosaurs, or fishes, or phytosaurs, or mammals, or whatever he may be after. First, by a method of trial and error, he learns just which levels or "horizons" in the rock layers are the fossil-bearing ones. Then he "walks out" the level, with one eye peeled for the precious fossils he is seeking, the other busy searching for the next place to step. Which latter is more important than it mav sound at first, for much of the business of "walking out" a formation in- volves a constant scramble along cliff faces, up and down the sides of canyons, in and out of arroyos or washes. Of course it is important for the fossil hunter to know just what he is looking for— indeed, much of the secret of successful collecting is the recognition of a fossil as it is exposed in the strata, usually with merely a trace of the entire organism show- Fossils are of many kinds Sometimes only an imprint of the skin is preserved. Here the skin itself has been replaced by minerals. (From a Duck-billed Dinosaur) skin £8. a*?*;.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Colbert, Edwin H. (Edwin Harris), 1905-2001; Knight, Charles Robert, 1874-1953; American Museum of Natural History. New York : Published for the American Museum of Natural History by McGraw-Hill
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Keywords: ., bookauthoramericanmu, bookcentury1900, booksubjectreptilesfossil
