Posts Tagged ‘vertical’

Horizontal Webs

Spider webs are usually vertical.

Obviously, these two are horizontal. The two strands — orange and other blue — are strands of silk that were  let out to hold the web in place. You’ll see a part of the web stretched across to another leaf nearby.

 This picture was taken in the same area as the two above, and at a different time of day.  A light breeze blew the web around, which resulted in the multi-colors reflecting from the web.

Advertisements

Horseshoe Upheaval

Southern Illinois definitley has an unique feature, known as the Horseshoe Upheaval.

IMG_5994 red

The rocks are about 350 million years old and were once some 3,500 feet below the surface. The tremendous power of the earth forced them upward. These upturned rocks are silca-rich limestone and chert of the Fort Payne Formation.

IMG_5994 upheavel

The Fort Payne layer is the deep rust-colored layer in the above illustration. A line marks the location of the upheaval. The narrow wedge is sandwiched on both sides by younger rocks. This suggests the fault system went through two episodes of movement in opposite directions. First the rocks south of the fault zone were uplifted, bringing the Fort Payne rock to the surface. Then the southern block dropped back down. A wedge of the Fort Payne rock was sheared off and jammed in place within the fault zone.

IMG_6003 red

I left my truck in the picture for size comparison.

IMG_6020 red

Notice how the layered chert is turned almost vertical

IMG_6023 red

Walking isn’t the easiest at this site.

IMG_6057 red

Calcite veining occurs in a lot of the rock.

IMG_6019 redAgain, the layering was pushed vertically from its original positioning.

IMG_6025 red

Mosses, lichens and a few plants grow in the upheaval.

IMG_6048 red

Buffy and I climbed up the slope and

IMG_6027 red

into the bowl-like top of the upheaval. Obviously, the area is better seen before the trees leaf out.

IMG_6043 red

This shows limestone.

IMG_6028 red

We didn’t circle the whole top area. Walking wasn’t the easiest.

The Horseshow Upheaval is part of the Saline County Fish and Wildlife Area.

Stone Masonary part 2

This is the second of three blogs on this hike.

Nature’s elements sure had a vivid imagination when it came to the designs in the rocks of a short bluff on Eagle Mountain.

IMG_5716 red

The hike up the steep hill to this short bluff was more than strenuous.

IMG_4266 red

This picture shows steepest part of the slope.

IMG_4246 red

The yellowish sandstone above lacks the iron of the patterned sandstone below.

IMG_4232 red

There were so many combinations in the lines,

IMG_4249 red

  bending and folding,

IMG_4251 red alt

  repetitions in the layering,

IMG_4252 red altand a diversity in cavity shapes.

IMG_4254 red alt

Why was there so much more layering, instead of solid shapes?

IMG_4258 red alt

This one was sure a curiosity.

IMG_4259 red

I just don’t understand what could cause such a diversity of designs. It was faster erosion of the regular sandstone and the slower erosion of the sandstone with the iron. Still there had to be a force that created the original layering before the start of the erosion.