Grand Canyon – A Living Record of Earth’s History

Spending time at the Grand Canyon was simply stunning, but it was also fascinating to absorb some of the geological history that was laid out in front of my eyes. So, I wanted to share some of what I learned to hopefully fascinate and titillate you as well. 20140129_140651 20140129_112234

But before I do this I wanted to let you know that currently companies have rights to mine uranium in the Grand Canyon – defacing this incredible natural wonder and (to my thinking) sacred space. The company currently mining in the Grand Canyon is called Denison Mines Corp. And their mining has been approved by the Arizona Department of Environmental Quality. They are also mining close to or at a Havasupai Tribal Sacred Site. You can learn more right here.

20140128_151451 20140128_163737

The earth is 4554 million years old. The oldest exposed rock in the Grand Canyon is 1840 million years old. It took The Colorado River only between 5-6 million years to create the Grand Canyon – in 5-6 million years the Colorado River exposed 1840 million years of rock record or 40% of the earths history recorded in those rocks. How fascinating is that? The rock record is exposed million of years before plants and animals appeared on earth, about 225 million years ago as this rock, floating in space, went through it’s initial upheavals to create our home. Then each era of life is recorded in the various rock formations.

20140129_123813

Above picture has taken each layer of rock, polished in and then displayed thin layer of each age to illustrate how the different layers represents a different time, and how each color represents a different rock record. 20140129_152537

Above is a picture of a piece of polished rock that is 1840 million years old. A full 40% of the earths history.

20140128_13025520140128_125818 Originally the land that I walked on in the Grand Canyon was on the other side of the equator and tropical land or tropical oceans. Through the moving of the land masses the land moved further North and lifted up giving the Colorado River a canvas to paint on. 20140129_140645 20140129_115625

There are various types of rocks, some with fossilized ocean and land life forms, others with preserved tracks and steps in the rocks. Each era has it’s own type of rocks, created with the raw materials available at the time, and entombing whatever life was available at that time. A few eras apparently have been eroded away in some places, but not all places. Which is why there are not that many dinosaur skeletons in the area. 20140128_131035 20140128_132652

From tropical ocean life, to dry land and back to tropical oceans. Through eras of volcano’s and colliding tectonic plates to create the lift that provided the canvas for the Colorado River. 20140128_145525 20140128_134945

Then, finally, 5-6 million years ago the Colorado River appeared and started to carve through the rock – and the Grand Canyon is still being created by the forces that have impacted this land for so long. The Colorado River on it’s own removes the equivalent of the thickness of a piece of paper from the rock each year. 20140129_140130

Above a picture taken of the Grand Canyon from space. 20140128_12243520140128_132645

Humans appeared in the Grand Canyon about 10,000 years ago, and the first human people there were hunter / gatherers. Later, the Native American Indigenous people settled down at the bottom of the Canyon where they had a lot of opportunities to grow things due to the relatively milder climate. There are also signs of carved out caves in the side of the Canyon where people either lived or stored food. 20140129_111744

Above, a picture of one of those caves.

20140129_140655DCIM100GOPRO

The various stunning colors that we see in the Grand Canyon are all different types and layers of rock that was created during the last 1840 million years.

DCIM100GOPRO 20140129_140718 - Copy20140128_16270220140128_13480220140128_131101

Advertisements

4 thoughts on “Grand Canyon – A Living Record of Earth’s History

  1. Seems like you’ve learned much about the Canyon, thanks for sharing, you must have spent a lot of time there.

    I sure hope you stay well as you conker your goal.

    Charlie

    ________________________________

    • THank you so much Uncle Charlie. I am in good health, and high spirits. I spent two days at the Canyon, and enjoyed it immensely.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s