Mt Simon Cambrian
The specimens on this page are all from the Mount Simon Complex of Wisconsin. The site is
famous for the enormous jellyfish and trackways that have been found, but a smaller fauna is also
present. The specimens represented below are all preserved either as trace fossils or organic
stains in the matrix. It has been dated to the upper Cambrian and at least one professional paper
on the site is readily available on the internet:

'Stranded on a Late Cambrian shoreline: Medusae from Central Wisconsin'
Geology; February 2002; v. 30; no. 2; p. 147–15. Hagadorn, Dott and Damrow.

Some pieces may have a light coating on them to better highlight the fossils (as is done with other
types of fossils) but none of the specimens have been faked. We have had quite a lot of this
material over the years and have never had any problems with it. It has been widely sold at shows
and does not have a reputation for being fake, only highlighted (the highlighting is not done by us
but the collectors). You can see in the images below how a couple of specimens seem faint and
others very defined, the latter are the result of the highlighting but we do not think it detracts from
the fossils.
Mount Simon #1 £60/$100
A large and small (
Pailiella)
jellyfish nicely defined on a
matrix slab.
Mount Simon #2
£125/$200
A presumed arthropod?
resting place. This
identification was made
by the British Museum.
Mount Simon #4
£400/$600
An excellent quality
display slab covered in
numerous small jellyfish
including
Pailiella.
Mount Simon #3 £250/$400
A large and small arthropod
resting place plus a half
dozen small Pailiella
jellyfish. This is a nice
display slab.
Mount Simon #5 £25/$40
On the front of this slab is part of a large
jellyfish and a single specimen of
Pailiella
pateliformis
. On the reverse is the trace
fossil
Inaria sp. The voids are believed to
have been formed by the body of this
enigmatic animal.
Mount Simon #6
$35/$55
A nice natural double
jellyfish slab including
Pailiella pateliformis.
Mount Simon #7
£35/$55
A nice natural double
jellyfish slab including
Pailiella pateliformis.
Mount Simon #8
£50/$80
A nice jellyfish multislab
containing 5 good
specimens including

Pailiella pateliformis
.
Mount Simon #9
£12/$20
A neat single specimen of
a jellyfish that is believed
to have affinities with
Tribrachidium.
Mount Simon #10
£12/$20
A neat single specimen of
a jellyfish that is believed
to have affinities with
Tribrachidium.
Mount Simon #11
£20/$35
A neat double specimen
of jellyfish that are
believed to have affinities
with
Tribrachidium.
Mount Simon #12
£20/$35
A neat double specimen
of jellyfish that are
believed to have affinities
with
Tribrachidium.
Mount Simon #13
£35/$55
A neat triple specimen of
jellyfish that are believed
to have affinities with
Tribrachidium.
Mount Simon #14 - £40/$65
On the front of this slab is part of a large
jellyfish. On the reverse is the trace fossil
Inaria sp. The voids are believed to have
been formed by the body of this enigmatic
animal.
Mount Simon #15 - £200/$325
A very good quality, well defined
specimen of the medium sized jellyfish
Rugoconites sp. A nice display piece.
Mount Simon #16 - £60/$100
A neat single specimen of an
undetermined jellyfish. A good
sized piece that is very displayable.