If you arrived here by any means other than from the Index of Impacts,
it is suggested that you start at the Introduction to gain an understanding of what follows.

Navajo Impact Site

     The Navajo Impact is very old, and complex. The center area is circled. This is one of the few impacts that actually resembles an impact crater. This area is the home of the Navajo Nation.

      A closer view of the impact area.

      This image shows the primary blast circle at 140 miles. To the Southwest is the Mongollon Rim of Arizona. To the Northeast, the mountains of northern New Mexico and southwestern Colorado. What appears to have happen here is that the meteor was either elongated, or broke up before impact. It then blew a large part of its material in all directions to form this circle of mountains. The way this meteor impacted caused the 'crater' to be less exact than other simple craters. Afterwards a number of later impacts pounded the area making the primary blast ring less distinct. Some of these later impacts are faintly marked on the image. There are many others that are not marked. This image is linked to a similar, but much larger image (4,800 x 2,512 pixels) for a closer examination.

      This image shows the two primary shock wave circles of this impact. The inner circle is at 100 miles and the outer circle is at 310 miles. This image is linked to a larger image (4800 x 2512  pixels) for more detail.


  The 100 mile shock wave circle.

The 310 mile radius circle. This image is expandable to 4800 pixels wide.

     The lake is Lake Powell. The river to the south is the Colorado River. Hoover Dam is located just to the left of the circle, where the Colorado River flows to the south, from the lake.

This circle is better defined HERE.

The Center

      The center area appears to be a line of formidable mountains from above. This was either an elongated object, or perhaps broke into several pieces before it struck, to form this line.

     When you see the center in a prospective view, it is not as formidable as it looks from above. This object added as much as 2,000 feet of elevation to the surrounding landscape, over an area 70 miles in length and 35 miles wide. If the outer surface was blown out in all directions to form the rim, and the denser interior is what remains here, it appears that the center would have been only 2% as dense as the Earth before it hit.
      Consider that if this impact left as much material below the surface as above the surface, that gives a maximum of 4000 feet thickness. If the meteor was roughly round along its 35 mile diameter before it hit, then 4000 / (35 x 5280) = 2.16%
     This impact was a dust ball, most likely a large comet.

Comments, information, discussion, e-mail me here:

Index of Impact Sites
© 2012 Terry Westerman