On the occurrence of a tree-like fossil plant, Glyptodendron, in the Upper Silurian (Clinton) rocks of Ohio

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ID: 306668
1878
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Abstract
IN the month of Jul.Y, 1877, while on a geological excursion in company with one of m,Y students, Mr. Leven Silel', in the vicinitv of Eaton, in Preble Count,Y, Ohio, the latter picked up and handed me a slab bearing the impression of a vegetable stem, which proved, on closer examination, to be that of a plant allied to Lepidodennron.As the beds in which we were working at the time lie at the very base of the" Clinton" of the Ohio Survey.and within a few feet of the break which marks the summit of the Oincinnati group of the Lowel' Silurian, the specimen immediately assumed unusual interest and importance; no indisputable traces of land-plants having then come to light f!"Om so Iowan horizon in Am~rica, and no remains of al'boresc€mt vegetation being known with certainty from strnta of so old a date in the New or Old W orId.The slab containing the impression was not taken out of the solid rock, but lay loose on the bank of Clinton limestone.This fact will naturally raise some question concerning its age in the mind of every geologist.Fortunately, however, we are not in this instnnce dependent upon such evidence.To any one practicall'y familiar with the Clinton rocks as they crop out around the Cincinnati uplift no doubt can arise.The stone is a piece of 'yellow, rough.encrinital limestone, considel'3bl,y weathered, with the characteristic appearance of the Clinton at Eaton and here.Moreover, by the Hide of the impression there lies embedded one of our commonest corals (Polyzoa?)closely resembling Cha!tete,~ lycoperdon (Hall) of the Clinton in New York, figured in the second volume of the New York Survey.Lastly, from the back of the slab I chipped out a small specimen of an lllomus; eithel' Illmnus Da.ytollensis (Hall and Whitfield, Ohio Pal.. vol.ii, 1875), or Illamus Barriensis (Murch.and Hall, 1862) (i.g. lllcenus loxus of Hall, 1847), the mould of which still remains in the slab.Its Silurian age is therefore placed beyond a doubt, no species of I1100nus being known in America above the Niagara g!"Oup,In describing and naming it, my first thought was to place it in the genus Lepidodend!"On, as a provisional arrangement pending the discovel',Y of mOl'e perfect specimens.But further stud,Y of tbe fossil and its nearest allies among the Sigillarids and Lepidodenchids has induced me to place it by itself in a new genus.which seems to fOl'm a connecting link between some other paleozoic genera.I append the following description ;-
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Authors E. W. Claypole
Journal american journal of science
Year 1878
DOI
10.2475/ajs.s3-15.88.302
URL
https://doi.org/10.2475/ajs.s3-15.88.302
Keywords Keywords not found

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