Here I am seen
at the Disphyllum coral locality in the pink platy limestones.
Dawn finds hordes
of Disphyllum tubes lying right on the ground here!
My backpack is
getting very heavy now. Which ones to take back?
Back home on the
bench, the selected specimens ready for the acid bath.
from the Disphyllum site:
Disphyllum on the
left and Aulopora on the right. The Aulopora was very fragmented,
and if we left the limestone in the acid too long, all we would
get is a pile of pieces. So as in this specimen, we only dissolved
the rocks about half way down to provide a stable base to hold
the corals. Even so, you have to be pretty careful on handling
Aulopora - such
a beautiful coral, this is a colonial tabulate with no septa
Aulopora - Closer
view with the web cam.
Side view of Disphyllum
colonial rugose shows the branching pipes from a common attachment
up showing exterior ribbing.
Disphyllum - another
Disphyllum - End
view of calice interiors showing septa.
An unknown closely
knit tabulate, that has been highly distorted from diagenesis.
another specimen from the acid bath.
Disphyllum - This
is an example of the many hordes of coral bits Dawn was finding
in certain areas in the pink platy limestones of the Martin.
Disphyllum - Close
up of one of the disconnected coral bits.
Unknown and poorly
preserved colonial rugose from the same area.
of the same type of unknown colonial rugose.
Here we see the
gorgeous Aulopora tabulate with its lovely prostrate branches.
Note that the calices are upturned to gather food from the more
Aulopora -At higher
magnification, the individual calices.
Aulopora - Note
the sheared off specimen to the right showing interior of the
close up showing septa clearly. The depth of field here is around
1/4". This type of photo would not be possible without focus
stacking software! (Picolay)
Fossils from the
Naco near the Power Line road:
Here we walked
along this road to find large amounts of red cherts, some highly
fossiliferous. Up ahead is the Mogollon Rim, the south end of
the Colorado Plateau.
Bone fragment found
in Naco. This type of fossil is very rare - Most of the time
we find sharks teeth that are very tiny. But here, a big piece
of what is most likely a fish bone in a huge boulder. (Yes, its
still there). Now some of you may question how we know this is
a bone and not just a piece of petrified wood or something. First,
of all, this is a deep water marine environment, with a depth
around 200 meters. Bone also does not have the exterior detail
of wood. Finally, it easily passed the famous "Lick and
stick" test. This is where you lick your finger, and touch
the fossil. The porous nature of fossil bone causes your finger
to stick like touching a piece of scotch tape, and the surrounding
rock will just get wet and not stick. Sharks teeth from this
formation do the same thing.
in the red cherts.
Horn corals preserved
as molds and coated with red chert.
Composita Subtilita brachiopods in red cherts. These were found
loose on the ground.
most likely Antiquonia sp.