Last September,
Hurricane Isabel ravaged the U.S. East Coast, upending trees, flooding cities,
killing people and leaving millions without power. In its devastating, furious
race up the coast, the hurricane did one positive thing: It unearthed an extremely
rare 8-million-year-old whale skeleton.
Calvert Marine Museum paleontologists pull an 8-million-year-old whale skeleton
from its resting place in the Calvert Cliffs off the Chesapeake Bay in Maryland.
The whale skeleton was unearthed by Hurricane Isabel in September 2003 and discovered
by amateur fossil hunters. Photo courtesy of Calvert Marine Museum.
Amateur fossil hunters found the 5.5-foot-long skull and other fossilized bones
along a stretch of cliffs in Maryland that is well-known for its plethora of
Miocene fossils. After extensive excavation, including a military-airlift rescue
of the fossil, the complete skull now resides in the Calvert Marine Museum,
on the Chesapeake Bay in Solomons, Md., where paleontologists and volunteers
are painstakingly cleaning it on the main museum floor.
The Calvert
Cliffs extend for 30 miles along the western shore of the Chesapeake Bay. The
cliffs, which sometimes reach as high as 100 feet, are the most complete sequence
of marine sediments exposed on the East Coast. They exhibit three distinct Miocene
(23.8 to 5.3 million years ago) formations filled with fossil shells and shark
teeth, as well as fossilized whale, dolphin and, occasionally, bird and land
mammal bones. The sandy cliffs erode 1 to 2 feet each year due to landslides,
waves and storms, which is why, when Isabel hit, Jeff DiMeglio and Sarah Gulick
of Alexandria, Va., headed to the cliffs to hunt for fossils.
The soft Miocene soils along Calvert Cliffs
on Marylands coast provide a rare fossil-viewing opportunity. Photo by
Megan Sever.
The fossil collectors first saw a large rib bone poking out of the base of the
cliff, says Stephen Godfrey, curator of paleontology at the museum. Closer inspection
revealed the front end of both lower jawbones as well. Guessing that they had
found something important, DiMeglio and Gulick called the museum.
When DiMeglio returned to the site with Godfrey, they found a complete whale
skull with both upper and lower jaws intact, even though the skeleton was upside
down. In addition to the skull, they found articulated neck vertebrae, a scapula,
ribs scattered throughout the area amidst many mollusk fossils and several shark
teeth.
I knew we had something big, Godfrey says excitedly. But before
we could excavate, we had to obtain permission from the family that owns the
land. This negotiation took nearly two months because the extended family
of the landowners wanted to be there when geologists started to quarry. They
were excited too, Godfrey says.
For two weeks, Godfrey and a team from the marine museum dug down around the
skeleton before encasing it in a field jacket a rigid, multilayer
carrying case made of burlap, plaster and wood and metal splints to transport
the fossil safely. However, once completed, the jacketed fossil weighed 1,000
pounds. Godfrey quickly realized that normal transportation would not suffice:
The remote cliff location meant no truck could reach it; the shallow bay water
precluded any large boat picking it up; and the skeleton would have sunk any
small boat. Thinking back to his dinosaur-excavating days in Alberta, Canada,
Godfrey decided to call on the military for air support.
Godfrey called the nearby Naval Air Station Patuxent River to see if an
8-million-year-old whale would pique their interest enough to help
and it did. On Dec. 16, 2003, a UH-3H Sea King helicopter with its search-and-rescue
team plucked the whale skull off the beach and flew it to safety, just as they
would a downed aircraft pilot.
In January, the skeleton went on public display in the middle of the museums
main floor. Since then, volunteers have been working every day to clean the
fossil. They answer questions from curious visitors and explain the excavation
process, while they meticulously scrape the sand and silty sediments away from
the shells and bones in the plaster jacket with old dental tools. Once the volunteers
finish clearing the upper side of the skull, they will make a cradle and flip
the skull over to remove the rest of the field jacket and entombing dirt, Godfrey
says, all in the public eye.
Showing the public how paleontology at least part of it
is done is great, says Warren Allmon, director of the Paleontological
Research Institute in Ithaca, N.Y. Over the past few years, volunteers have
been excavating a mastodon on the institutes floor. People came
out in droves and loved looking at the excavation and talking about the process,
Allmon says. Using volunteers in the research and excavation process is doubly
beneficial for the public, he says, in that the scientists educate people, both
young and old, who then pass on their knowledge to the wider public.
Watching people prepare fossils is neat, agrees Mark Uhen, curator
of paleontology and zoology at the Cranbrook Institute of Science in Michigan.
The Cranbrook Institute has requested a grant to build a paleontology prep
lab, something most museums have. Showing the process of science
is extremely beneficial for students and the public, and can serve to
excite people about science, Uhen says.
The Maryland whale has excited people both locally and beyond, Godfrey says
from the people on whose land the fossil was found, to the people flocking
to see the live excavation. The national press coverage of the whale discovery
and excavation has put the locally known museum on the national map.
School groups are welcome at this kid-friendly museum. And at several public
beaches along Calvert Cliffs, adventurous visitors can beach-comb for fossils
to their hearts content.
All
about the whale
The
8-million-year-old whale, exposed by Hurricane Isabel last September in
cliffs along Marylands coast, was 18 to 20 feet long, as its 5.5-foot
skull indicates making it small by modern standards but fairly
large for the Miocene. Geologists have dated the whale by correlating
fossils found with the skeleton to identical fossils in other formations
of known geologic age. |
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