In the alluvial plain into which the Schutter flows the the loess is two hundred feet thick. The loess rises eighty feet above the Schutter. At Lahr it has been denuded so as to form a succession of terraces on the right bank. It was in the lowest of these from which the skeleton was taken. Immediately below this bed there were found pebbles, and still lower down was a bed of gravel containing rounded stones of sandstone and gneiss from the Black Forest. There are several interesting facts connected with this discovery. M. Boué considers that the loess of the Lahr is continuous with that of the Rhine, and before the loess had been denuded there was not less than eighty feet of loamy deposit above the human skeleton. The glaciers had deposited their great gravel beds, and had began to melt. The melting of them had formed a mixture of loam and gravel. Then when the torrents poured forth from the glaciers the loam was formed without the pebbles. The unfortunate man, whose remains were found, was buried far beneath the surface, during the very first part of the course of the violent streams pouring forth from the field of ice. The glaciers were then on the retreat, and the incautious man probably fell a victim while on the chase.[20] The cave of La Naulette, Belgium, afforded a jaw-bone similar to the Moulin-Quignon. The bone came from a river deposit of loam covered with a layer of stalagmite, and at a depth of thirteen feet from the surface. Associated with it were the remains of the mammoth, woolly-haired rhinoceros, and flint implements. These implements present the same type as those of St. Acheul. With this jaw were also found a human ulna, two human teeth, and a fragment of a worked reindeer born. This jaw-bone is very thick, round in form, and the projection of the chin is almost entirely absent. The chin is said to hold an intermediate position between that of the animals and those of the present race of men. The cavities for the reception of the canine teeth are very wide, and one of the most remarkable things is that the three molars are reversed, that is the first true molar is the smallest, and the last the largest. The inner surface of the jaw at the point of the suture or symphysis, forms a line obliquely directed upwards. Taking the jaw all in all, it is the most ape-like human jaw ever discovered.[21]