The Flora of the Matawan Formation (Crosswick's Clays) (Classic Reprint)

The Flora of the Matawan Formation (Crosswick's Clays) (Classic Reprint)

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Excerpt from The Flora of the Matawan Formation (Crosswick's Clays) The materials are variable; sands and clays predominate. The sands are sometimes white and coarse, but more com monly fine-grained and colored by iron, even causing local induration, or they may be mixed with argillaceous materials forming silvery micaceous sand, or chocolate-colored marl, glauconite grains being present in greater or less amounts. The clays are generally black or drab, locally carrying seams and pockets of glauconite; occasionally they are calcareous as a result of their molluscan contents. The thickness is variable, but becomes reduced to the southward. It increases considerably to the southeast, judg ing from the well records?ie In northern Burlington county the Matawan is less than 200 feet thick; east of Philadelphia and Camden it is 125 feet; in Gloucester county it is 175 feet in places; in Salem county it is 80 feet; in Delaware not over 60 feet; near the mouth of the Sassafras river in Mary land it is 100 feet; in eastern Anne Arundel county it is 60 feet; in western Anne Arundel county and Prince George county it is thinner, until at Fort Washington bluffs it is a little more than 15 feet. Its farthest known southern appear ance is in the valley of Piscataway creek; on the Opposite shore of the Potomac the Eocene rests directly on the Poto mac formation. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.show more

Product details

  • Paperback | 96 pages
  • 152 x 229 x 5mm | 141g
  • Forgotten Books
  • United States
  • English
  • , black & white illustrations
  • 0243192975
  • 9780243192977