Verrill, A. Hyatt (Alpheus Hyatt), 1871-1954 · New York, R. M. McBride & co. · leaf 60
tuations where rocknever occurred. In such cases the bones have beenfossilized while the surrounding material has re-mained unchanged. In ancient times many greatreptiles and mammals (Fig. 5) became mired inswamps or broke through the ice on ponds andlakes and to-day their bones, in fossil form,… … Fossils {See Chapter III)
Collectors and collecting
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
