Museum Crews will Return to Dig Site for Seven Weeks Starting in May
Media Contact:
Heather Hope
Public Relations Manager
Denver Museum of Nature & Science
303-370-8372
[email protected]
DENVER-February 23, 2011-The Denver Museum of Nature &
Science has reached agreements with the Snowmass Water and
Sanitation District (SWSD) and the State Historical Preservation
Office that will allow excavation crews to return to Ziegler
Reservoir in May 2011. Museum crews will spend seven weeks between
May 15 and July 1 continuing the excavation of an exceptionally
preserved series of Ice Age fossil sites that were first discovered
in October by a bulldozer driver working on the expansion of the
reservoir.
"We are very pleased that our collaboration with the Snowmass
Water and Sanitation District and the Town of Snowmass Village will
continue for another season," said George Sparks, president and CEO
of the Denver Museum of Nature & Science. "The
discoveries made last fall at Ziegler Reservoir are among the most
significant in Colorado history, and having additional time to
excavate this spring will further enhance our scientific
understanding of this amazing find."
After the discovery of the original juvenile Columbian mammoth in
mid-October, Museum excavation crews arrived at Ziegler Reservoir
near Snowmass Village in early November to begin digging for
additional fossils. Over a two week period, they uncovered an
exceptionally well-preserved Ice Age ecosystem that produced a
bumper crop of Ice Age plants and animals, including parts of
- Eight to 10 American mastodons
- Four Columbian mammoths
- Two Ice Age deer
- Four Ice Age bison
- One Jefferson's ground sloth (the first ever found in Colorado)
- One tiger salamander
- Distinctly chewed wood that provides evidence of Ice Age beavers
- Insects including iridescent beetles
- Microscopic crustaceans called ostracods
- Large quantities of well-preserved wood, seeds, cones, and leaves of white spruce, sub-alpine fir, sedges, seeds, and other plants
By the end of the fall 2010 excavation, Museum crews had
recovered approximately 600 bones and bone pieces from the Ziegler
Reservoir site, including 15 tusks, two tusk tips, and 14 bags full
of tusk fragments from the mammoths and mastodons, plus hundreds of
pounds of plant matter. The fossils are currently being preserved
in the Museum's conservation lab in preparation for scientific
study.
The agreement between the Museum and SWSD, and an excavation
permit from the state archaeologist, allow Museum crews to excavate
in the same area of Ziegler Reservoir where most of the fossil
discoveries were made in November. Crews will remove any fossils
that are in the ground below the dam construction site. This will
allow SWSD to complete dam construction on schedule without
damaging or burying any fossils. The Museum expects to have as many
as 40 people working at the dig site at a time, including a small
number of formal and informal
educators from the Roaring Fork Valley who will be selected and
trained as volunteers to work side by side with renowned
scientists and other Museum staff doing the actual work of the
excavation.
The agreement also allows the Museum to leave a small excavation
crew at the site after July 1, as construction continues on Ziegler
Reservoir. They will recover additional fossils that might be
exposed by large machinery as they excavate clay to build the dam.
The State of Colorado owns and manages fossils found on state land
or land managed by smaller governmental entities including
districts such as the SWSD. The fossils are preserved in designated
museums for the benefit of the public. The Denver Museum of Nature
& Science is the designated state repository for the Ziegler
Reservoir fossils.
The Museum has assembled a team of 34 scientific experts from 15
institutions in the United States, Canada, and England to study the
discoveries. Some members of the science team will be joining the
excavation team at Ziegler Reservoir for a portion of the
dig.
"We are really excited to return to Snowmass Village in May, and
we are confident we can complete the excavation in a timely fashion
that will allow Snowmass Water and Sanitation District the time
they need to complete their dam and reservoir," said Kirk Johnson,
the leader of the Museum's excavation team and vice president of
the Research and Collections Division. "This is a
once-in-a-lifetime opportunity and we will make sure that the
fossils are properly recovered and that we accomplish the science
that is needed to understand this amazing
discovery."
The Ziegler Reservoir excavation site is one of the most important
paleontological sites in Colorado for several reasons:
- The high-altitude setting of this fossil site (8,874 feet) is consistently underrepresented in the Ice Age fossil record.
- The site contains several fossil-bearing horizons that allow for the reconstruction of a series of Ice Age ecosystems and potentially a better understanding of Ice Age climate change in the Colorado Rockies.
- It is exceedingly rare to discover such a diversity of plants and animals from an Ice Age ecosystem in one place. Normally, scientists must use information from many different sites to piece together a picture of what plant and animal life was like in the Ice Age. At this site, they can assemble a very complete picture from one location.
- The preservation of the fossils discovered at Ziegler Reservoir is exceptional. Plant matter found at the site is still green, and at least one of the tusks recovered from the site is still white after tens of thousands of years. Scientists think there is a good chance of recovering well-preserved ancient DNA from some of the fossils.
The age of the site is also of particular interest to
scientists. Initial radiocarbon dating indicates that the Ziegler
Reservoir site is more than 45,000 years old, and geologists
estimate the site could be as old as 130,000 to 150,000 years.
Discovery of such an old Ice Age site is very rare and will provide
scientists with an opportunity to learn about an earlier part of
Ice Age history.
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About the Snowmastodon Project™
The
Snowmastodon Project™ encompasses the excavation, research,
preservation, educational, fundraising and marketing activities of
the Denver Museum of Nature & Science surrounding the Snowmass
Village Ice Age fossil site. This name has been formally filed with
the State of Colorado and is a trademark of the Denver Museum of
Nature & Science.
About the Denver Museum of Nature &
Science
The Denver Museum of Nature & Science is the Rocky Mountain
Region's leading resource for informal science education. A variety
of engaging exhibits, discussions and activities help Museum
visitors celebrate and understand the natural wonders of Colorado,
Earth and the universe. The Museum is located at 2001 Colorado
Blvd., Denver, CO, 80205. To learn more about the Museum,
check www.dmns.org, or call 303-370-6000.
Many of the Museum's educational programs and exhibits
are made possible in part by generous funding from the citizens of
the seven-county metro area through the Scientific & Cultural
Facilities District.