Archive image from page 128 of Dawn of life being the. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom dawnoflifebeingh00daws Year: 1875 THE PEESEEVATION OF EOZOON. 103 that wlien decalcified tliese are most beautifully repre- sented by tlieir casts, Dr. Hunt lias proved the filling mineral to be a silicate of alumina, iron, magnesia and potash, intermediate between serpentine and glauconite. We have, therefore, ample warrant for adhering to Dr. Hunt's conclusion that the Lauren- Fig. 25
Archive image from page 128 of Dawn of life being the. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom dawnoflifebeingh00daws Year: 1875 THE PEESEEVATION OF EOZOON. 103 that wlien decalcified tliese are most beautifully repre- sented by tlieir casts, Dr. Hunt lias proved the filling mineral to be a silicate of alumina, iron, magnesia and potash, intermediate between serpentine and glauconite. We have, therefore, ample warrant for adhering to Dr. Hunt's conclusion that the Lauren- Fig. 25. tfotJit o/ a Crinoid, kaving its pores injected with a Hydrous Silicate. Upper SiltLTian. Limestone, Pole Hill, New Bruuswiek. Magnified 25 diameters. tian serpentine was deposited under conditions similar to those of the modern green-sand. Indeed, indepen- dently of Eozoon, it is impossible that any geologist who has studied the manner in which this mineral is associated with the Laurentian limestones could believe ifc to have been formed in any other way. Nor
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Keywords: 1800, 1870, 1875, americana, archive, biodiversity, book, bookauthor, bookcentury, bookcollection, bookcontributor, bookdecade, bookpublisher, booksubject, bookyear, dawson_john_william_sir_1820_1899, drawing, eozoon, harvard_university, harvard_university_museum_of_comparative_zoology, historical, history, illustration, image, life, london_hodder_stoughton, museumofcomparativezoology, page, paleontology, picture, print, reference, vintage
