January 29 - February
1, 2003
During the last weekend of January,
Val and Glade (and Roxy the Boxer) went to southern Nevada to work
the Middle Cambrian rocks in hopes of finding some of the much-coveted
Albertella trilobites. January is the perfect time of year for weather
conditions. Temperatures can reach into the 100s from March
to October. We encountered beautiful clear skies and temperatures
in the 60s and 70s. The downside of working in January
is the short daylight hours and long winter nights. During the summer
we usually camp out but under these circumstances we stayed in town
in a nice air-conditioned room and lots of good food.Our
first day was spent at a location with no roads near the exposure.
It was on the backside of a mountain. We had to climb up one side
and down the other. That meant climbing back up with a pack full of
rock at the end of the day. We were able to locate the formation and
a site that had never been looked at before. On the surface of the
exposure were a number of complete Albertella as evidence that no
one had ever collected here. This is one of those dream locations
with good numbers of complete specimens. But with a hike this difficult,
you had to ask yourself, Was it worth it. The answer was,
yes! |
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View looking at the Nevada
desert northeast of the quarry
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This is what the exposure
looked like when we first got there. Several of the layers had both
complete and partial specimens showing on the surfaces.
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Val at work with the Wizard
Bar opening up a fresh exposure
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Glade at work
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Glade finds a nice Albertella
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A large, nearly complete specimen
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Val at work on the steep hillside
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Roxy is checking out the wild
Burros in the valley below
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A couple of wild Burros, leftovers
from the old mining days of the 1800s
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A very tired Glade at the
end of the day with a pack full of trilobites
and a very difficult mountainside in the background
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One of the better specimens
found that day. Although it was cheekless, it had
nice color and measured about 2 ½ in length.
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The largest Albertella found
on the trip. This one measures over 3 ½ to
the tip of the spines. These almost look like Bristolia with their
long
genal, maxiplueral, and pygidial spines.
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The second day was spent working
a site we had found on our previous trip in September of 2002. The
location is near a ghost town in southern Nevada. The only sign
of life is the one remaining house near the highway. This location
had another species of Albertella. The hike was not as difficult
as the day before, but the quarrying was not as easy either. It
was not unusual to find more than one specimen on a surface, though
we were not able to find the high mortality zone that we had hoped
for.
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Glade at work on the mountainside
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Glade using the wizard bar to
loosen a rock
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Glade moving heavy over-burden
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Val using the wizard bar to
loosen a rock
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Val trying to work while Roxy
is letting him know that she has sore feet
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One of the very nice Albertella
found at this site. Note that the spines on
this species are much shorter than the ones found the day before.
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Another fine specimen found
that day.
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This specimen looks to be the
appendage of an Anomalocaris.
They were the giant predators of the Cambrian.
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The third day was used for
prospecting. We encountered a few wild horses. The day was spent
reading and studying maps, driving around on poor roads, and hiking
rugged hills. Finally late in the day our efforts paid off and we
found evidence of the much hoped for mortality zone. We found ourselves
unprepared for working in the hard limestones though. We wished
we had brought our heavy hammers and our Persuader.
The rock split poorly but we got an occasional glimpse of layers
that we nearly covered with articulated specimens. Most were small,
less than ¾ of an inch in length. Still it was exciting to
find those layers when we did.
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We looked at this mountain and
could see the formation but it was about
a three-mile walk and several thousand foot climb. We passed on
this one.
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The scenery was incredible.
Not a tree to mar the view. Just a few yucca.
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The barrel cacti were very
colorful, though not yet in bloom.
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We did check out this mountain
but had no success here.
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Wild horses in the distance
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Glade standing by one of the
giant yuccas. These look more like
small palm trees than yuccas plants.
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Here is a sample of the mortality
layer. The specimen needs some more
preparation but shows eight complete/or nearly complete trilobites
on this surface.
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| More evidence of the mortality
layer |
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| One of the Albertellas that we
found. This one needed a little preparation. |
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Another view. Unfortunately
the axis and head were weathered already.
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