. Elements of geology : a text-book for colleges and for the general reader. Geology. 478 MESOZOIC ERA—AGE OF REPTILES. in deep seas. These are all extremely minute, but some of larger size are found in the Cretaceous limestone of Texas. Those from the chalk have already been given (p. 471). Sponges are extremely common in_the_-chalk, as they are also in deep-sea bottoms of the present day. About one hundred have been found in the chalk. Echinoderms.—The free Echinoderms are now for the first time in excess of the stemmed. The Echinoids are especially abundant and. Please note that these image
. Elements of geology : a text-book for colleges and for the general reader. Geology. 478 MESOZOIC ERA—AGE OF REPTILES. in deep seas. These are all extremely minute, but some of larger size are found in the Cretaceous limestone of Texas. Those from the chalk have already been given (p. 471). Sponges are extremely common in_the_-chalk, as they are also in deep-sea bottoms of the present day. About one hundred have been found in the chalk. Echinoderms.—The free Echinoderms are now for the first time in excess of the stemmed. The Echinoids are especially abundant and. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original LeConte, Joseph, 1823-1901. New York : D. Appleton and Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeology, bookyear1892
