Skip to main content

The Grand Canyon


On the second day of our road trip (see my last post here), we visited the Grand Canyon, which is in northern Arizona.

The Grand Canyon was formed by the Colorado River. The river ran over soil on the ground, and washed it away. Soon the river got to solid rock, and began to wear through that, too. As it wore through the rock, a huge gorge formed, with the river flowing through it. That gorge was the early Grand Canyon.

As time went by, the canyon got deeper and deeper. The sides of the canyon fell into the river at places, and the river washed it away. When it rained, creeks and streams ran down into the canyon, eroding the sides and giving it an intricate, complicated shape.


Finally, after about 40 million years of erosion, my family and I came along, and looked at the result. It's pretty impressive. Unfortunately, it was rather cold at the time, so we weren't able to stay as long as we would have liked; but it was a great experience just the same.

While I was there, I took the stereoscopic pair of images you can see at the bottom of the post. If you go cross-eyed until the images completely overlap, the combined result will appear 3D. It is very hard for inexperienced people to do that; if you have trouble, try this: put your fingertip in front of the screen, below the photos. While looking at your fingertip, slowly bring it closer and closer to your face. Keep your head level relative to the photos while you do this. Pay attention to the two photos, and stop moving your finger when the photos completely overlap (about 1 foot from your face). Carefully look at the photos; do not allow your eyes to readjust. If you're lucky, the result will be an image that appears 3D. If not, that's okay; some people just can't do it.



For the next post in the Arizona Road Trip series, go to http://greatmst.blogspot.com/2013/02/meteor-crater.html
Labels:

Comments

  1. AnonymousJanuary 27, 2015 at 1:21 PM

    Wow! The stereoscopic image is awesome! I can view it pretty well going cross eyed, and so much detail pops out! So cool!

    ReplyDelete

Post a Comment

Popular posts from this blog

Should Tau Replace Pi?

The digits of π, organized in a very new way Happy π-day! And happy π-month! Today's month and day - that is, March 14 or 3.14 - includes the first 3 digits of π. And today's month and year - March 2014 or 3.14 - also includes the first 3 digits of π. We won't have another double-day for π for the next 100 years, so enjoy this one! For the special occasion, I'm posting two π-related posts - one for π-month, and the other for π-day. In both posts, I'm setting the font size to approximately π * π + π + π. This is the first post, for π-month; to see the second, go to http://greatmst.blogspot.com/2014/03/pi-month-pi-day-post-2-5-common-pi-myths.html . In this post, I am including an essay I wrote about whether π or τ is the more superior constant. This was written for people who know very little about math, so the basic idea should be easy to understand even for people who are not mathematically inclined. Should Tau Replace Pi? A constant is any number or value that ne...
Post a Comment
Read more

The Geminids

The Geminid meteor shower is coming up! At 2:00 AM, on December 14 (that's Thursday night, or Friday morning), you can see anywhere from 100 to 150 meteors per hour - depending on the sky and weather conditions. That's more than 1 meteor per minute! This particular meteor shower comes from a 5.1 km wide asteroid called 3200 Phaethon. Flecks of debris fall off this asteroid in a trail around the sun. These bits are called meteoroids . Every year, in December, Earth passes through this stream of meteoroids; when one of them enters Earth's atmosphere, it burns up and we see a meteor. If the meteor is brighter than Venus, it's called a fireball. Fireballs are much less common than meteors. This year, viewing conditions will be especially good; the peak occurs only 1 day past new moon. If you live in an area with lots of light pollution, you will definitely want to drive into the country. If you think the weather will be bad, go out a day or two before or after the peak. Kee...
Post a Comment
Read more

Which Hurts More?

212° F Let's play a little game. I'll list a bunch of possible actions. Each action will have 2 variations, (a) and (b). You choose either (a) or (b), depending on which would be safer (or less painful). Each of the questions will involve an oven hot enough to bake a cake (350° F), and a pot of boiling water (assume we're at sea level). So... would you rather: 1.     (a) Stick your hand in the oven     (b) Stick your hand in the boiling water   ... for a period of 10 seconds 2.     (a) Leave a fork in the oven     (b) Leave a fork in boiling water   ... for a period of 15 minutes. Then hold the fork tight with your bare hand. 3. Fill a jar to the top with cool tap water. Then:    (a) Place the jar in the oven    (b) Place the jar in the boiling water   ... for a specific, but unknown, period of time. Then remove the jar and put your hand in it. First see if you can figure these out yourself. They shouldn't be too...
Post a Comment
Read more