NPS Picture of New Dinosaur, Utah Museum |
Atrist Rendition of New Dinosaur, Mural at Visitor Center |
We
headed into the fossil-rich areas of NW Colorado, SW Wyoming and SE Idaho. Geologic conditions of shallow seas,
freshwater lakes, ponds, bogs and streams were the environments for dinosaurs,
fish and other vertebrate animals. These
conditions generated and preserved a lot of fossils from various geologic ages.
Fortunately for us, only partial erosion of these fossil-bearing rocks and
layers through geologic time have left many of the fossils in place and
accessible to us in the 20th century.
Exhibit at Dinosaur National Monument |
The
geologically-oldest stop was Dinosaur National Monument in NW Colorado and NE
Utah. The fossils were discovered in 1909
and protected in 1915. It is very interesting to see the earliest photos of
spectators traveling great distances in horse-drawn wagons and the earliest
autos to this remote area to see these fossils.
The intense interest and efforts by these people was incredible,
generated only by printed newspapers and magazines – this is true for all these
discoveries of nature These fossils are about 150 million years old.
In_site (In Place) Dinosaur Bones in Quarry Wall. Exhibit Hall |
The
largest fossil “quarry” there contains the most concentrated and diverse
collection of Jurassic Period dinosaur bones, including complete skeletons
which are now housed in several of the world’s greatest museums. The fossil bones have been left in place so
you can see over 1500 dinosaur fossils exposed on the cliff face inside the
Quarry Exhibit Hall. The hall was
actually built around the quarry wall to protect and preserve it. It is hypothesized that the quarry wall
represents a deep pool on a stream that collected the larger animals that died
quickly during a flood and swept into the pool, and that were then preserved as
mud (now solid rock) covered the dead dinosaurs. This could explain the huge
number and concentration of only large dinosaur’s bones….the smaller Jurassic
dinosaurs would have been swept further downstream.
Excellent Preserved Fish at Fossil Butte |
Displaying even
younger fossils, Fossil Butte National Monument, “America’s Aquarium in Stone”,
is located in SW Wyoming. It has the best visitor center and fossil exhibition
of all the places we visited. A large
lush lake in a warm, wet environment about 52
million years ago generated a plethora of life forms in an abundant
ecosystem. A single “limestone” layer
captured the entire ecosystem, and the fine sediments, along with an anoxic and
salty bottom environment, caused everything, including soft body parts,
feathers, and scales to be preserved.
The fossils have amazing details and the plants and animals are
preserved almost to perfection. It is estimated that over two million specimens
have been found in the last 125 years. Today, less than 1.5% of Fossil Lake is protected and
managed by the National Park Service. Fossil Butte National Monument is a site
that promotes the protection of this world-class paleontological heritage. You can purchase excellent quality fossils in
nearby Kemmerer, WY which have been dug out from the private (not protected)
quarries in the area.
Bob with Hagerman Horse |
The youngest fossils were found at Hagerman Fossil Beds
National Monument in SE Idaho. The
fossils found here are only about 3 to 4
million years old, and represent several different ecosystems: wetlands and
grasslands. These fossils have been useful in helping to provide a record of
evolutionary changes in the plants and animals as the landscape and climate
evolved. The fossil beds protect more
than 220 fossilized species including the unique “Hagerman Horse”, the extinct
North American horse (the wild western horses we know were from the Spanish conquistadors
in the 1500s). As a note, there also
used to be a camel-like creature that is now extinct.
The visitor center at Hagerman was not up to usual Park
Service standards, and with the exception of the horse, could easily be by passed.
However, this visitor center also had a very interesting exhibit about the
nearby Minidoka National Historic Site where thousands of Japanese Americans
(and other Asian races) were interned during WWII. We have heard of these activities, but this
exhibit is the most graphic and informative we have ever seen.
Seeing various fossil beds so closely together gave us a
greater perspective on the various geologic ages and how they relate to each
other. The most astonishing fact is that
there have been at least 4 mass extinction events (at least 50% of the species
extinct) in the worlds 4.5 billion year
history. Most of us are aware of only
the one that supposedly “destroyed” the dinosaurs.
We departed the fossil
fields and continued into Southeast Idaho and the famous Snake River Valley. On
our first night in Idaho we parked at the Pocatello Elks Lodge located in
downtown Pocatello near the once-huge Union Pacific Railroad yard.
Interestingly, the city of Pocatello and the Elks Lodge have closely
intertwined history related to the Union Pacific Railroad. The City was established in 1860, as a stop
on the Union Pacific Railroad during the gold rush. During the railroad’s days of massive
employment, the Elks Lodge had over a thousand members who found it convenient to
use the facilities (bar) on their way home from work. Now, the Lodge has only 180
members. We spent a couple of enjoyable hours
at the bar talking with a few members about the Lodge and City history. One
robust, sophisticated and very articulate and savvy member is noteworthy. He is
a former railroad worker and is 90 years old and has been an Elk for 65 years
and has many interesting things to talk about.
Bob told him that he hopes to be standing at an Elks Lodge bar (or any
bar) when he 90 years old telling his life stories to anyone who will listen This is just one example of the interesting
and “informative” characters we are meeting on this trip
Linda at Shoshone Falls ID on her 65th |
We visited Shoshone Falls on the Snake River
in Twin Falls, Idaho which is nicknamed the “Niagara Falls” of the west
(frankly there is little comparison). We were destined to see a lot of the
Snake River over the next few weeks from here to its origin in Yellowstone
National Park. Linda celebrated her 65th this day.
Craters Volcanoes and Lava Fields |
This is an
opportunity to see “Plate Tectonics” in action where the North American and
Pacific plates are colliding and magma is relatively close to the surface. Over the past 18 million years or so, this
hotspot in the earth’s mantle has remained stationary while the earth’s crust
(North American Plate) has moved southwest “moving” the hotspot from under the
Snake River Plains to its current location under Yellowstone NP. This hotspot has generated the succession of
violent eruptions with floods of lava flows and has the potential for eruptions
in the great Yellowstone caldera.
Craters of the Moons Lava Field from Space, NASA |
Spring flowers on 7000 yr old cinder cone, Craters |
The lava fields from an eruption about 2000 years ago have almost no growth on them. The cinder cones and lava fields from an eruption about 7000 years ago, have some low grasses, and a few trees. It is hard to believe that it takes 7000 years for the lava to break down enough to support plant life.
Bob hiking Lava Tubes Craters of Moon |
As a pleasant attraction from black lava flows and fossil fields, spring continues to follow us as we travel….wildflowers everywhere. Even the older lava beds had small plants with tiny flowers on them.
We
continue to be awe of these beautiful environments and how God used the natural
processes of nature to shape and reshape this incredible and dynamic planet Earth. We are blessed to be able to make this trip
and follow in the footprints of the earliest explorers of nature. Everyone
should be so fortunate.
We
now head east to Jackson Hole WY and the Grand Teton and Yellowstone National
Parks. We are looking forward to our
niece, Breanna Adams, visiting us in Yellowstone to share in the wonders.
The
weather has been colder than we expected, and we have had to use our propane
heat every night and buy an extra blanket.
The days are getting warmer, but it is still early spring most of the
places we are visiting.