Geology . While some are undifferentiated, the majoritybear definite resemblances to modern genera, and some (as Sassafras,Ficus, Myrica, and Aralia), are referred to living genera, while othersare given generic names implying the similarity of the fossil leavesto those of living plants (as Saliciphyllum, willow-like leaves, Querco-phyllum, oak-like leaves, and analogous names for plants whose leavesresembled those of the elm, walnut, maple, eucalyptus, and others).To these were added, in the Amboy (N. J.) clays at the very close ofthe period, figs, magnolias, tulip trees, laurels, cinnamon, a
Geology . While some are undifferentiated, the majoritybear definite resemblances to modern genera, and some (as Sassafras,Ficus, Myrica, and Aralia), are referred to living genera, while othersare given generic names implying the similarity of the fossil leavesto those of living plants (as Saliciphyllum, willow-like leaves, Querco-phyllum, oak-like leaves, and analogous names for plants whose leavesresembled those of the elm, walnut, maple, eucalyptus, and others).To these were added, in the Amboy (N. J.) clays at the very close ofthe period, figs, magnolias, tulip trees, laurels, cinnamon, and otherforms referred to modern genera, but not to modern species. Thecycacleans had dropped to an insignificant place, and the conifers andferns, while not equally reduced, were markedly subordinate to theangiosperms. The land animals.—The aspect of the vertebrate life was inter-mediate between that of the Jurassic and of the Upper Cretaceous, and1 Newberry, Mon. XXVI, U. S. Geol. Surv., 1895, p. 134 GEOLOGY, has been sketched already. Very little Is known of oilier forms of terrestrial life. The fresh-water fauna. The molluscan fauna of the inland waters had assumed a pronouncedly modern aspect as illustrated in Fig. 385. It had probably assumed consider-able importance through the exten-sion of the fresh waters, hut therecord is by no means so ample aswould he expected if the depositswere made mainly in lakes and riverchannels, and this is an additional FI(S. 385!—Fresh-water fauna of the ( Jo- miS(m for the gTOWUlg opinionmanchean (Lower Cretaceous) from that the terrestrial deposits were Montana (alter Stanton). Pelecypoda: . a, Unio fam Stanton; b, Unio doughssi in considerable part the products Stanton; Gastropoda: c Vunparw t land-wash of the more tran-rnontancsis Stanton; a, Goniobosis (?) ortmanni Stanton; e, Campeloma har- sient type, due to overflows,lovttonensis Stanton. , , , . storm-wash, sheet-wash, and other forms of more strictly subaerial aggradatio
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