Download e-book for kindle: An Introduction to Paleobotany by Chester A. Arnold

By Chester A. Arnold

ISBN-10: 1406718610

ISBN-13: 9781406718614

A few of the earliest books, rather these relationship again to the 1900s and earlier than, are actually tremendous scarce and more and more pricey. we're republishing those vintage works in cheap, top of the range, glossy variants, utilizing the unique textual content and paintings.

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An Introduction to Paleobotany by Chester A. Arnold PDF

A number of the earliest books, relatively these relationship again to the 1900s and sooner than, are actually tremendous scarce and more and more dear. we're republishing those vintage works in cheap, top of the range, glossy versions, utilizing the unique textual content and art.

Extra resources for An Introduction to Paleobotany

Example text

Algae rank second in importance to the vascular plants as vegetable organisms in seiies. Geologically they are significant for the roles they have played in limestone and petroleum formation. Limestones believed to have been formed by algae occur in the oldest rock formations, and the geological the deposition of calcium carbonate as a result of the activities' of these organisms has been going on continuously in the warmer seas since the This deposition has been going on earliest decipherable geologic times.

Bodies of both consist of several layers of heavily cutiriized and within the tissue of the cutinizcd spores are cells, body borne in tetrads. (B) (A) Fid. 20. (A) Foerstia ohioensis. from photograph by White. X Drawn about 10. Sporocarpon and Foerstia arc found in the Upper Devonian black shales of Kentucky and OHio. Although their affinities X about 10. are unknown, they are similar in appearance to certain modern brown algae that inhabit the zone between the tides, but being cutinized were able to withstand longer exposure to Differ in the dry air.

19), which ranges from the Ordovician to the Jurassic. Solenopora produced biscuit or headlike limestone masses with a lobate surface which, when sectioned vertically, theless, certain One of the best are seen to consist of faintly visible radiating lines (the algal filaments) and wavy concentric bands which probably represent seasonal accretions. A Recent member of the Rhodophyceae which extends back into the The thallus of this plant forms a hard stony is Lithothamnium. mass on the surface of a submerged rock, and the exposed surface is Triassic AN INTRODUCTION TO PALEOBOTANY 48 irregular or warty.

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An Introduction to Paleobotany by Chester A. Arnold

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