GIANT MASS DEATH ASSEMBLAGE OF JURASSIC SEA URCHINS WITH SPINES IN MATRIX
JURASSIC (BAJOCIAN) :
171.6 - 167.7 million years ago
We have offered some amazing
and rare specimens of prehistoric marine and this remarkable fossil is
certainly no exception. It is an extraordinary LARGE block of an
entire layer of intensely packed sea urchins in
with their spines,
from the Middle Jurassic. The species is called Acrosalenia
hemicidaroides. This is not a fossil found from any
commercially mining operation and was privately collected making it
unique and likely a one-of-a-kind find likely not to be repeated.
We have seen very small fragments of this layer available for sale for
hundreds of dollars but never a specimen anywhere near as large as this
giant and UNBROKEN layer block. The entire block is a large
portion of the entire layer and the sea urchins and spines fill this
entire large thick specimen. A piece like this is certainly the
perfect candidate to be the centerpiece for any very advanced fossil
collection. Many sea urchin fossils with spines are prepared with
acid which dissolves the matrix and loosens the spines so that they come
off the plate. The spines are then reassembled around the central
portion called a TEST, to restore the appearance of the urchin.
Such specimens are unnatural and we have seen several on the market in
the recent past. This is a 100% NATURAL specimen and is prepared
with no restoration or such artificial assembly of the spines.
What you see is exactly as the layer was exposed. There is
NO REPAIR and NO
RESTORATION. An absolute RARE showpiece fossil specimen and very
Sea urchins are ECHINOIDS and are members of the echinoderm family.
They were living creatures that lived on the bottom of soft ocean
floors. The featured long spines protruding out from a central
ball-shaped body called a test. Sea urchins move about the bottom
by the use of small tube feet. Their diet consists of various
living and decaying plant and animal matter.
OF JURASSIC SEA URCHINS IN AN INTENSELY PACKED MASS DEATH BED WITH
$1995 EC003 INCLUDES
Item - One Only