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Sioux Falls in Minnehaha County, South Dakota — The American Midwest (Upper Plains)
 

Cactus Hills

 
 
Cactus Hills Marker image. Click for full size.
August 27, 2022
1. Cactus Hills Marker
Inscription.  Early geologic research into glacial deposits indicated that during the Ice Age there were only four periods of glaciation in North America. Today fourteen episodes of glaciation are recognized. Deposits from five of these episodes are found in Minnehaha County. From the most recent to the earlier episodes they are named: late Wisconsin, Illinoian, and pre-Illinoian 1, 2, and 3.

The Cactus Hills are composed of sand and gravel deposits left more than 300,000 years ago by streams flowing from a receding pre-Illinoian glacier. They mark the point where the ice front stalled before continuing its retreat.

Originally the outwash deposits were more extensive, but subsequent erosion by late Wisconsin meltwater removed much of the original deposit. Remnants of the deposit, of which the Cactus Hills are a part, are found at higher elevations on both sides of the Big Sioux River valley.

Geologically the Cactus Hills are part of a series of kames and terraces extending to the northeast toward Garretson, SD.
 
Erected 2004 by the Minnehaha County Historical Society and the City
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Topics. This historical marker is listed in this topic list: Natural Features.
 
Location. 43° 34.691′ N, 96° 39.873′ W. Marker is in Sioux Falls, South Dakota, in Minnehaha County. Marker can be reached from East Rice Street, 1˝ miles east of North Bahnson Avenue, on the right when traveling east. Located in Great Bear Ski Valley in Sioux Falls. Touch for map. Marker is at or near this postal address: 5901 E Rice St, Sioux Falls SD 57110, United States of America. Touch for directions.
 
Other nearby markers. At least 8 other markers are within 3 miles of this marker, measured as the crow flies. Albert M. Mansor (approx. 2.2 miles away); The Amidon Affair (approx. 2.4 miles away); Memorial to the Pioneers of Minnehaha County (approx. 2.4 miles away); Magma (approx. 2.4 miles away); Amidon Graves Mystery (approx. 2.4 miles away); South Dakota School for the Deaf (approx. 2.9 miles away); Fort Dakota Soldiers (approx. 2.9 miles away); 1936 Powder House Blast (approx. 2.9 miles away). Touch for a list and map of all markers in Sioux Falls.
 
Cactus Hills Marker image. Click for full size.
August 27, 2022
2. Cactus Hills Marker
Cactus Hills Marker at Great Bear Ski Valley image. Click for full size.
August 27, 2022
3. Cactus Hills Marker at Great Bear Ski Valley
Hills of Great Bear Ski Valley image. Click for full size.
August 27, 2022
4. Hills of Great Bear Ski Valley
 
 
Credits. This page was last revised on September 3, 2022. It was originally submitted on September 3, 2022. This page has been viewed 134 times since then and 47 times this year. Photos:   1, 2, 3, 4. submitted on September 3, 2022.

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Jun. 19, 2024