Sioux Falls in Minnehaha County, South Dakota — The American Midwest (Upper Plains)
The Sioux Quartzite
The Sioux Quartzite consists of thick beds of silica-cemented quartz sandstone, the grains of which were deposited and rounded by wave action in the floor of an ancient continental sea. This fact is illustrated by laminations and ripple marks preserved in the quartzite. The density of the rock resulting from the cementation and compaction makes it very resistant to erosion as shown by the falls at this site; the Big Sioux River has been flowing in its present course here for about 10,000 years.
In Pioneer Days this rock was the principal building and paving material in this area. At the present time its use as an aggregate in concrete construction makes the Sioux Quartzite an important natural resource of Eastern South Dakota.
John Bradford District, Sioux Council
Erected 1965 by Sertoma Boy Scout Troop 48, John Bradford District, Sioux Council. (Marker Number 393.)
Location. Touch for map. Marker is located along the walkway near the south edge of Falls Park, about 1/10 mile southwest of the Visitor Center. Marker is at or near this postal address: 301 East Falls Park Drive, Sioux Falls SD 57104, United States of America.
Other nearby markers. At least 8 other markers are within walking distance of this marker. Hazel O'Connor (about 400 feet away, measured in a direct line); Legacy of Ice and Rock (about 400 feet away); Prison Quarry (about 400 feet away); Inland Seas (about 500 feet away); Namesake of the City (about 500 feet away); Harnessing the River (about 500 feet away); Foundation of the City (about 500 feet away); Beginning of Great Changes (about 500 feet away). Touch for a list and map of all markers in Sioux Falls.
Related markers. Click here for a list of markers that are related to this marker. Sioux Quartzite, Sioux Falls, South Dakota
Also see . . .
1. About Sioux Quartzite. Sioux quartzite outcroppings are the areaís most unique geological feature. The outcrops of Sioux quartzite start at Redstone in East New Ulm, MN and extend 180 miles west to Rockport Colony along the James River, south of Mitchell, SD. The north-south band of outcrops is about 40 miles wide. Quartzite was quarried in the late 1800ís and early (Submitted on October 4, 2018, by Cosmos Mariner of Cape Canaveral, Florida.)
2. Sioux Quartzite's Ancient Beauty. Sioux quartzite, the hard stone that the Big Sioux tumbles over at Falls Park in Sioux Falls, is ancient. Those that study rocks say it was formed around 1.5 billion years ago. It is really hard to fathom. The last dinosaurs are supposed to have been around 60 million years ago. Thatís a drop in the bucket compared to our Sioux quartzite. This rock formation has been fairly stable and in existence for roughly a quarter of the time Earth has been a planet. (Submitted on October 4, 2018, by Cosmos Mariner of Cape Canaveral, Florida.)
Categories. • Natural Resources •
Credits. This page was last revised on October 11, 2018. This page originally submitted on October 1, 2018, by Cosmos Mariner of Cape Canaveral, Florida. This page has been viewed 40 times since then. Last updated on October 11, 2018, by Cosmos Mariner of Cape Canaveral, Florida. Photos: 1, 2, 3, 4. submitted on October 3, 2018, by Cosmos Mariner of Cape Canaveral, Florida. • Andrew Ruppenstein was the editor who published this page.