Konservat-Lagerstätten, mass mortality, teleosts, Las Hoyas, taphonomy
Abstract
Over 100 juvenile teleosts found in two mass mortality slabs are perfect examples of exceptionally preserved fossils from the Las Hoyas Konservat-Lagerstätten, for they are articulated and preserve soft tissues, such as the body outline and the eye. The analysis of the distribution, direction and sense of the fishes in these slabs, as well as a set of taphonomical features (curvature, gasping mouth and tetany of fins) suggest that their mass death was likely not due to hypersalinity but to anoxic or hypoxic conditions or the presence of toxins in the water.
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