File:The American Museum journal (c1900-(1918)) (18133214326).jpg

Title: The American Museum journal
Identifier: americanmuseumjo06amer (find matches)
Year: c1900-(1918) (c190s)
Authors: American Museum of Natural History
Subjects: Natural history
Publisher: New York : American Museum of Natural History
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: Biodiversity Heritage Library

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CONARD-FISSURE GROUP 123 Particular attention will be given to any data bearing on the climate and conditions of life in that region when the Uintatheres and hornless Titanotheres, Four-toed Horses, primitive Rhinoce- roses, carnivores, rodents and insectivores inhabited it, and on how their remains came to be entombed in the rock strata where they are found. It has already been discovered that the Bridger formation is derived from volcanic ashes, so that active volcanoes must have existed at no great distance. This may be at least partly true of the other Eocene formations also. It is probable, too, that the climate was then very different from that of the present day, and the height of the region above sea-level much less than now. The third expedition under Mr. Albert Thomson will search the later Tertiary formations of South Dakota for fossil mammals and especially for Three-toed Horses. Previous explorations in this region and elsewhere have shown that there was a great num- ber and variety of Three-toed Horses in America during the later Tertiary epochs, but most of them are incompletely known and the problem of the direct ancestry of the modern Horse is not yet satisfactorily solved. Doctor Matthew and Mr. Gregory will join the expedition during a part of the season and Professor Osborn hopes to be with Mr. Brown's party in Montana for a short time.
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THE CONARD-FISSURE GROUP HE Department of Vertebrate Palaeontology has placed on exhibition in its hall a model of the Conard Fissure in northern Arkansas, an open crack formed by small upheavals of the earth's surface, in which have been found great numbers of fossil bones. The fissure is located in the forest-covered Ozark Hills about fifteen miles south of the town of Harrison. During the Pleistocene epoch it was open and was inhabited by large and small carnivorous animals, such as the bear, tiger and weasel, and by rats, mice, birds and snakes, the bones of which, to- gether with those of other beasts which they had dragged into their lairs to devour and gnaw at leisure, were buried in the earthy and stony accumulations. About 10,000 skulls, jaws and

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