. Archaeologia Nova Caesarea. aroused. A great argillite boulder, measuring ten feet in length,seven in width and five in thickness, was recently exposed inan extensive series of excavations, near Bristol, Pennsyl-vania, where the Trenton gravel reaches tO the present sur-face, and often has no distinctly traceable soil above it. Itfills now a one-time river bed, the limits oi which, in pre-glacial time, were defined by vast deposits of clay. The 41 coarse gravel and sand were not only over and about theboulder but extended many feet below it. It rested on thegravel as well as in it. It could
. Archaeologia Nova Caesarea. aroused. A great argillite boulder, measuring ten feet in length,seven in width and five in thickness, was recently exposed inan extensive series of excavations, near Bristol, Pennsyl-vania, where the Trenton gravel reaches tO the present sur-face, and often has no distinctly traceable soil above it. Itfills now a one-time river bed, the limits oi which, in pre-glacial time, were defined by vast deposits of clay. The 41 coarse gravel and sand were not only over and about theboulder but extended many feet below it. It rested on thegravel as well as in it. It could only have reached its presentresting place through the agency of a vast ice field floatingtoward the sea. No other explanation has ever been such an occurrence ever happened here may be hard torealize, yet here is an irrefragable proof. As a geologicalphenomenon, it is but one of many and one of minor im-portance save for this, which enhances its importance athousand fold, the association of this boulder with the. Pig. 2. Boulder in Trenton gravel, near which implement was found. history of early man. At such suggestion, this huge rock,which excited wonder, now startles us. There is somethingillogical in this attempting to trace back the career of ourown kind. We seem never in the same frame of mind aswhen studying some fossil shell or bone of an extinctmammal. These are here, of course. Why not? Butremains of man; O! that is different. It may be argueduntil dooms day that it is inherently improbable that manshould have been associated with a pliocene fauna, but could 42 it have been any more difficult than to Hve, as a low species OfHomo does to-day, with the fauna of an African jungle orwith the marsupials of Australia, survivors of a still moreancient time? Seldom so favorable an opportunity for searching in thegravel occurs as this has been at Bristol, and the result offrequent visits is one chipped sandstone pebble. Not asplinter of bone or fragment of shell,
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