. Edinburgh journal of science . When the workmen penetrate at any time through the marl, the pit is suddenly inundated by water springing up from below, from the sand and gravel which form the subsoil. This marl is highly fibrous, and somewhat laminar in its structure, and when dry, is as light, and nearly as white as chalk. The shells are delineated white upon a darker ground, and are seen by separating the fibrous layers, but are seldom, if ever, found in their original state. I question much whether shells exist in all parts of the basin, certainly not at its margin. In this basin vast qua
. Edinburgh journal of science . When the workmen penetrate at any time through the marl, the pit is suddenly inundated by water springing up from below, from the sand and gravel which form the subsoil. This marl is highly fibrous, and somewhat laminar in its structure, and when dry, is as light, and nearly as white as chalk. The shells are delineated white upon a darker ground, and are seen by separating the fibrous layers, but are seldom, if ever, found in their original state. I question much whether shells exist in all parts of the basin, certainly not at its margin. In this basin vast quantities of bones of the large species of elk are found. The workmen have constantly met with them
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