Pyritized Eldredgeops Trilobite
Order Phacopida, Family Phacopidae
Time: Middle Devonian
mm = 1 inch): Trilobite is 25 mm (curve measure) by 18 mm across
Windom Shale, Hamilton Group, Moscow Formation, Erie County, New York
Here is a remarkable example of preservation: a totally pyritized
Eldredgeops rana trilobite. Its rich golden color has led me
to coin the term Midas Touch when referring to these specimens.
This is a recent find, and one that I do not believe has ever
been offered before. Pyrite is typically prone to the oxidative
degradation termed “pyrite disease”. Examples of
these have been subjected to forcing conditions with no ill effects.
Nevertheless as a precaution they have been given a coating of
an achival quality material which is employed in the conservation
of ancient artifacts. While all found to date are somewhat small,
they make up for lack of size in tremendous eye appeal. What
is most unusual about this one is the fact that where are portion
the exoskeleton has been burned away you can see several appendages
in situ. Before now only the Beecher Bed and the recently discovered
analogous layers of Triarthrus eatoni were the only site to show
such preservation. This case is most likely displays what is
termed a steinkern, a cast of the original appendages that has
been infilled by sediment an subsequently pyritized. To my knowledge
examples with such preservation have not been offered before.
This is the SECOND and LAST I have to offer.
trilobite pictures to enlarge