Reports Dealing with the Systematic Geology and Paleontology of Maryland, Band 4
Johns Hopkins Press, 1911
"Bibliography [of the eocence deposits of Maryland]," vol. 1, p. 31-43.
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Acrostichopteris Albian Arundel formation Baiera Baltimore Band Barremian basal base beds Berry Brachyphyllum branches Brongniart Bull Celastrophyllum character Cladophlebis clay Collection.—U. S. National Museum cones Cycadeoidea cycads decurrent deposits described diameter Dioonites distal Dryopteris Dunker Dutch Gap Equisetum Federal Hill ferns Fontaine Plate forms Foss fossil Fredericksburg Frenelopsis frond genera genus Heer Jurassic Knowlton Kootanie large number lateral leaf leaves lobes Lower Cretaceous Mantelli margin Marsh Maryland material Mesozoic midrib Morosaurus Muirkirk Nageiopsis Nathorst Neocomian nerves Occurrence.—PATAPSCO FORMATION Occurrence.—PATUXENT FORMATION Onychiopsis Patapsco formation Patuxent formation Pecopteris petiole pinnae pinnules Pinus plants Podozamites Portugal Potomac Group Potomac Run Proc Professor Fontaine rachis referred represented Rept sand Sapindopsis Saporta Schenk Schimper Sequoia Sequoia Reichenbachi Seward showing slender specimens Sphenolepis Sphenopteris stout Surv thick Thyrsopteris U. S. Geol U. S. Natl Upper Cretaceous veins venation Virginia Ward Wealden width xlviii Zamites
Seite 49 - Virginia ; a Geographical and Political Summary, embracing a description of the State, its geology, soils, minerals, and climate ; its animal and vegetable productions ; manufacturing and commercial facilities ; religious and educational advantages ; internal improvements and form of government.
Seite 48 - Geological phenomena, and the deductions derivable therefrom, in 250 miles of sections, in parts of Virginia and Maryland. Also, notice of certain Fossil Acotyledonous Plants in the secondary strata of Fredericksburg...
Seite 42 - ... of the formation to the Jurassic upon the evidence of the plants alone. " I do not, however, desire to be understood as arguing for the Jurassic age of the Potomac formation. The most that it is intended to claim is that, if the stratigraphical relations and the animal remains shall finally require its reference to the Jurassic, the plants do not present any serious obstacles to such reference.
Seite 185 - It was not more than one-half the size of the western species, and its proportions were extremely slender. The bones are very light and hollow, the metapodials being much elongated and their walls extremely thin. An ungual phalanx of the manus measures about 25 mm. in length ; and 14 mm. in vertical diameter at the base. This animal could not have been more than 5 or 6 feet in length.
Seite 240 - Pteris, etc., to cast doubt upon the botanical affinity of Cladophlebis species unless these are attested by a considerable body of evidence. It is believed, however, that the Potomac species are all to be included in the subfamily...
Seite 37 - ... to there is exposed another group of strata with which, at first view, the sandy and argillaceous layers of this formation might readily be confounded. These are the silicious, argillaceous, and pebbly beds, which, underlying the Tertiary in Virginia, and the well-marked Cretaceous formation farther north, have, in the latter region, been regarded as belonging to the base of the Cretaceous series of the Atlantic States. In Virginia the formation consists typically of a rather coarse and sometimes...
Seite 48 - B. : Report of the progress of the Geological Survey of the State of Virginia for the year 1840. Rogers, Wm. B. : A reprint of the annual reports and other papers on the geology of the Virginias.
Seite 38 - Fredericksburg containing similar remains, and to favor their being referred, at least in part, to the horizon of the upper Jurassic rocks. Possibly we may find here a passage group analogous to the Wealden of British geology.