An elliptical basin found using LiDAR images near the Oxley Nature Center in Tulsa, Oklahoma
by Eric Brown has led to a surprising archaeological discovery.
The lines carved on the west side of the Tulsa Basin are aligned with the sunrise during
the solstices and the equinoxes.
The Tulsa Basin is probably the best ancient solar observatory in the United States.
Welcome to another edition of the Carolina Bay of the Day where we study the secondary
impacts made by the glacier ice boulders that were ejected by an extraterrestrial impact
on the Laurentide Ice Sheet.
There is a link to the LiDAR visualization tool for Google Earth by Michael Davias in
the description of the video.
Today, we will discuss how the Tulsa Basin solar observatory worked.
Previous presentations have proposed that the Tulsa Basin has the same origin as the
Carolina Bays because 1) it has an elliptical geometry characteristic of inclined conical
cavities, 2) it has raised rims typical of impact cratering and 3) its major axis is
oriented toward the Great Lakes.
These three features are consistent with the Glacier Ice Impact Hypothesis published in
2017.
Pay close attention to the lines forming a V on the west side of this basin.
We start by noting that the Tulsa Basin is perfectly elliptical.
This is typical of well preserved Carolina Bays.
A well-formed berm approximately 15 meters wide surrounds the elliptical basin.
This berm could only have been sculpted by humans.
Typical Carolina Bays have a broader rim at the distal end of the ellipse created by the
forward momentum of the projectile, but it is not regular like the Tulsa Basin.
Parallel lines approximately 11 meters apart are carved on the ground to the west of the
Tulsa Basin and converge at a 60 degree angle.
When I saw this pattern, I immediately thought about the Serpent Mound in Ohio, which is
oriented toward the setting sun on the summer solstice.
This occurs on the 21st day of June when the sun reaches its northernmost point on the
horizon and it is the longest day of the year.
It is immediately evident that the point of the converging lines is not aligned with the
major axis of the basin.
I used the Solar Calculator of the National Oceanic and Atmospheric Administration to
find the azimuth of sunrise for the Tulsa Basin on June 21st.
I found that a line bisecting the angle carved on the ground was aligned with the summer
solstice on June 21st at sunrise (06:08 AM) with an azimuth of 59.97 degrees.
The lines carved on the ground in an east-west direction are aligned with the vernal equinox
on March 21st at sunrise (7:26 AM) with an azimuth of 89.03 degrees.
These same lines in an east-west direction are aligned with the autumnal equinox on September
22nd at sunrise (7:12 AM) with an azimuth of 89.2 degrees.
Three of the Earth's seasonal changes are accounted for.
The NOAA solar calculator shows that the sunrise during the winter solstice has a heading of
119 degrees.
However, the LiDAR image does not show any lines carved in the ground in that direction.
I considered that the lines expected for the winter solstice with a heading of 119 degrees
could have been obliterated by the work that the Civilian Conservation Corps did in the
1930s or by other types of erosion.
However, the reason for the lines aligned to the northeast with a heading of 29 degrees
becomes evident when we consider the heading of the sunrise during the winter solstice.
The lines oriented in a northeast direction have a heading of 29 degrees, which is at
a right angle with the heading for the winter solstice.
The clever people who constructed this solar observatory must have used an instrument like
a carpenter's square aligned with the carved northeast lines to get the heading for the
winter solstice.
The lines carved on the ground to the west of the Tulsa Basin are evidence that this
site was used as a solar observatory to track the seasons.
Knowing the cycle of the seasons has always been very important for planning the right
time for planting crops and for hunting animals during their yearly migrations.
There are many examples of solar observatories in America.
Some are spiral carvings on rocks and others are circular arrangements of rocks, like the
Medicine Wheel in Bighorn National Forest, Wyoming, which has a diameter of 23 meters.
The Tulsa Basin solar observatory measures 381 meters from the vertex of the lines to
the northeast rim of the ellipse.
The ellipse is bigger than the Rose Bowl in Pasadena, California.
Without doubt, the Tulsa Basin is one of the best examples of solar observatories in North
America.
Thank you for joining me in the investigation of the Carolina Bays and the Younger Dryas
cataclysm.
I will continue to examine the Carolina Bays one bay at a time.
My book about the Carolina Bays is available at Amazon.
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Bays.