The 21st Century Matriarch

We took two road trips over the past month --- opportunities to observe Missouri geology along the roadsides! My copy of Roadside Geology to Missouri has been a good reference.

The first was from our home near Springfield MO to St. Louis. Interstate 44 dominates the route and there are plenty of roadcuts first on the Springfield Plateau then the slightly lower Salem Plateau…finally down the northeastern flank of the Ozark Dome close to St. Louis. Our day trip was on a sunny day, so it was easy to take pictures.

One of the most interesting road cuts is at the north side of the rest stop near mile marker 235. The Roadside Geology book says – “Tilted blocks of Pennsylvanian sandstone and shale….are part of a down-dropped block of rocks along a fault zone or a filled-sink structure, or perhaps both.” I took pictures from the south side of the road as we were going toward St. Louis

And then one as we passed by on the return.

We noticed caves and state parks along the way and are planning a ‘field trip’ in April to see some of those.

The second was from our home near Springfield MO to Loess Bluffs National Wildlife Refuge near Mound City MO. The route took us from the Springfield Plateau to the Salem Plateau…then the Osage Plains as we turned toward Kansas City and crossed the Missouri River…finally to the Glaciated Plains of Northern Missouri. The day was sunny, making photographs of road cuts as my husband drove possible. I even got two pictures of the roadcut near out home as we set out!

The road cuts were less pronounced as we got further along…and more crumbly. On a botanical note – the sycamores are easy to spot this time of year.

I was so busy photographing overpasses and the bridge at Kansas City that I didn’t realize the bridge was over the Missouri River!

The Loess Bluffs (in this case roadcuts) look very different than the roadcuts further south. The loess here is from the edges of glaciers of the last ice age. Plants sometime can take root…but often sluff off and the loess is revealed again.

And then we reversed toward home.

Previous Missouri Geology posts

The geology class/lecture I am taking at Missouri State University is providing good background in general geology…but I am most interested in the geology of Missouri…trying to be more aware of the geologic features around me.

My copy of Roadside Geology to Missouri has been a good reference. On the drive from Nixa to Branson, MO, my husband’s navigation system took a scenic route (to avoid a construction area); the two-lane road was predominately downhill and followed Woods Fork over to US 65.

The road cuts are spectacular along US 65 with one of the tallest marking the margin of the Springfield Plateau…and then the Salem Plateau as we continued south. There are layers of limestone, dolomite, and shale. There were frozen ‘waterfalls’ from some of the cuts. The day was sunny, so it was easy to get pictures of the cuts as we moved past.

We stopped at the Branson Scenic Overlook downstream from the dam that created Table Rock Lake. The overlook area was the first proposed location for Table Rock Dam. There were evidently too many cracks and faults in the rocks to build it at this location. The dam was built in the 1950s and spans the White River creating the deepest lake in Missouri.

The view for the overlook shows Branson and the lake in the distance but I was more interested in the river immediately below…the bare trees and remnants of snow…ripples in the cold water.

Our field trip to the prairies near Lockwood MO (from Springfield) took us from the Springfield Plateau to the Osage Plains. It was a very cloudy day, so I took few pictures - I did notice the flattening out as we drove around farmland with parcels being maintained as prairie. There were low rolling hills. There was a significant windfarm….indicating that the wind there is reliable enough to make it worthwhile.