This is a picture of my most recent painting. I did it in a class, and today was actually my last day of that class. I got inspired to make it because of Wonderland Lake and the mountains, but it didn't really turn out looking like that. I wish you guys could see it in person!
Monday, February 28, 2011
Hey y'all! What's up?
This is a picture of my most recent painting. I did it in a class, and today was actually my last day of that class. I got inspired to make it because of Wonderland Lake and the mountains, but it didn't really turn out looking like that. I wish you guys could see it in person!
Sunday, February 27, 2011
Hangman
We Get Israeli Haircuts
Lynn is first in the chair. Ari, who doesn't speak much English, suggests short. Lynn agrees.
Thanks, Ari.
Wednesday, February 23, 2011
Learning Hebrew with an Old Brain
Tuesday, February 22, 2011
Warning: Amateur Geologist at Work
Sand
Covering most of the ground here is a layer of sand, which in some places forms into dunes, as pictured below. The dunes here aren’t soft like the ones in the Great Sand Dunes National Monument back in our home state of Colorado. Instead, they’ve been windblown and sun baked into a nearly rock hard consistency.
Composite Rocks
Just below the top layer of sand comes a layer of composite rock (pictured below). It largely consists of chunks of the layers below cemented together with what looks to me like either compacted sand, crumbled limestone, or a combination of the two. The stones within the composite, for the most part, seem to be similar in wear and size with the loose rubble in the dry river beds below.
Limestone
Limestone is typically deposited when an area is covered by a shallow sea. It largely consists of the shells of tiny ancient sea creatures that fall to the bottom when the creatures die. Limestone is amongst the softest sedimentary rocks and erodes into complex patterns. Most caves, for instance, are found in limestone formations. Here are a few examples of limestone formations in the Negev.
It’s common to find limestone formed into layers that separate and crumble in complex ways.
This ring pattern is widespread in the limestone in this area. I don’t know what forms it.
Chalk
Chalk is a form of limestone that is deposited in relatively deep waters. It consists of microscopic plates shed by ancient microorganisms. Chalk is white and forms steep cliffs. It’s not clear to me yet where the other forms of local limestone end and the chalk begins. An excellent example of chalk can be found in the cliffs around Ein Avdat, a local spring that still features running water.
Here the chalk formation has been turned up on end so that the layers are eroding into spikes that resemble hair.
In this picture, running water from an ancient and long since dried up stream carved complicated patterns into the chalk.
Also, chalk is often eroded by water into smooth surfaces resembling soft serve ice cream.
Flint
The only rock I’ve found which provides relief to the unending vistas of limestone and chalk is flint. No surprise there, given that wherever you have limestone and chalk, you’re likely to also find flint. Because flint is composed of quartz, where the rocks are broken open, they appear glassy. Sometimes they are black and grey in color. They may also be quite colorful, containing reds, browns, whites, and greens as seen in the pictures below.
Because flint is so much harder than the surrounding limestone and chalk, it’s the only mineral around here that will take on a desert varnish (as seen in the pictures below). The varnish comes from minerals such as clay, iron oxide, and manganese oxides that accumulate on the surface of the rocks and then bake in the sun. The limestone and chalk are too soft to have a surface stable enough for varnish to form.
Flint typically forms in thin layers and nodules in limestone and chalk. Here’s an example of a stairstep formation caused by alternating layers of chalk and flint nodules (see picture below). Because the chalk is softer than the flint, the chalk layers erode out from underneath the flint layers. Eventually, the flint protrudes out enough that it breaks off, as shown in the close-up of the same formation below.
Sunday, February 20, 2011
I love orienteering!
Yesterday, my mom and I went to a special event in Nitzana. That is a little village right on the borderline of Egypt. We got there at about ten, and went orienteering. For those of you who don't know what that is, it's when you get a map with lines for trails but they aren't named. It also has little dots where the different places are. You have to find your way to those dots.
Miriam's blog post
Saturday, February 19, 2011
Jay's Journey up a Slot Canyon
To enter the slot canyon, I first had to pass through a stone arch. The arch wasn't created by erosion like the arches in Arches National Park. It was created by a few large rocks that fell upon each other, leaving a gap between them. After I passed through the doorway, I turned around and took this picture:
The walls of the slot canyon are composed of soft limestone.
Looming over the canyon walls were a variety of limestone pillars and spires.
I continued to walk up between the narrow walls.
At the end of the slot canyon was a dry waterfall. I could only imagine how refreshing it would have been to have stood underneath that waterfall on a hot day when it was still running.
Here's a detail from the cliff to the side of the waterfall. Here the rock layers are thin, turned vertical, and warped by tectonic activity. They looked to me like blades of grass.
After a little sightseeing, it was time to go back down the canyon.
Here are some heavily eroded features from the canyon walls.
Here's a rock tower, looming over the slot canyon.
Here's a picture looking up above the slot canyon walls.