The formation of the deposit can be interpreted by dividing it into two parts. The upper part was constituted by dumped sediments from old excavations; this can be inferred from the condition and morphology of the layers themselves, which contained a chaotic mixture of Holocene material and some bone fragments from the Pleistocene period.

The sediments were mainly dark grey, with a more or less clayey consistency, rich in charcoal fragments, which probably relate to the Holocene layers which at one time covered the entire cave floor. The stratigraphy in question seems to be the result of modern digging activity which involved the upper Holocene levels of the cave.

The lower stratigraphic units produced disjointed skeletal remains of the Pleistocene period which were probably carried and deposited by the water which penetrated into the cave. This hypothesis was confirmed by the way in which the finds were deposited. Two skulls of Ursus spelaeus that were found both had a number of long bones sticking into the eye sockets. (MiBAC)