The Sioux Quartzite

The Sioux Quartzite (HM2BZR)

Location: Sioux Falls, SD 57104 Minnehaha County
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Country: United States of America
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N 43° 33.378', W 96° 43.454'

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Inscription
The Sioux Quartzite, deposited more than a billion years ago, is among the oldest rock exposed in South Dakota. The quartzite and associated pipestone deposits were known to white men as early as 1822, but the American Indian used pipestone centuries earlier to make ornaments and utensils.
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.
Donated by Sertoma Boy Scout Troop 48,
John Bradford District, Sioux Council
Details
HM NumberHM2BZR
Tags
Year Placed1965
Placed BySertoma Boy Scout Troop 48, John Bradford District, Sioux Council
Marker ConditionNo reports yet
Date Added Friday, October 5th, 2018 at 2:01pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)14T E 683814 N 4825110
Decimal Degrees43.55630000, -96.72423333
Degrees and Decimal MinutesN 43° 33.378', W 96° 43.454'
Degrees, Minutes and Seconds43° 33' 22.68" N, 96° 43' 27.24" W
Driving DirectionsGoogle Maps
Area Code(s)605
Closest Postal AddressAt or near 131 E Falls Park Dr, Sioux Falls SD 57104, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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