The Monte Bolca Eocene fossil site is a single quarry near the
village, known as the Pesciara (meaning the fish bowl) because
many of the marine fossils are fishes. The fossils are some
49 million years ago, having been deposited in the Eocene Epoch
of the Tertiary Period
of geological time. The Italian government considers fossils
of this Lagerstätte
to be a national treasure. The formation comprises 19 metres
of fossiliferous limestone in which certain horizons contain
fossil with truly exquisite preservation earning the site the
designation as a Lagerstatte.
Fishes and other creatures have been found with internal organs
and other details such as skin color preserved. An anoxic environment
delayed decay and deterred scavengers.
The
fossils are collected by boring tunnels deep into the hillside
formation, following the seam where the fossil fish layer goes
into the mountain. The same family has owned this quarry for
almost four hundred years. When the weathered matrix is split
the fish open, but the rock ALWAYS shatters, such that all but
the smallest Bolca fish are repaired. The larger fossils are
normally reassembled from dozens of pieces. These fossils have
been collected for centuries. During the crusades were considered
(yep, THOSE crusades) to be remains of the last supper and are
still considered to this day by many as evidence of the great
flood. Kings of Europe collected them for their sheer beauty
and rarity.
Fossils
discoveries include the moonfishes Mene rhombea and Mene oblonga,
the batfish Eoplatax papilio, spadefish Exellia velifer, the
fish Ceratoichthys, the crocodile Crocodilus vicetinus, and
the snake Archaeophis bolcaensis.
Monte
Bolca Quarry Fossils
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