Quarry Layers

Quarry Layers (HM28R3)

Location: Pipestone, MN 56164 Pipestone County
Country: United States of America

N 44° 0.785', W 96° 19.501'

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Inscription
This former quarry reveals the area's basic geologic layers. Beneath a cover of soil, the thick, pink-tinted layer of Sioux quartzite covers the tin, red-colored lower layer of pipestone - the prized stone of many tribal groups. As the slant of the quarry floor indicates, the rock layers angle deep into the earth.

Geologic pressures created the pipestone and quartzite layers over the past one billion years. Formed at the bottom of an ancient ocean, these layers of sediment were gradually compressed into stone and uplifted over the ages. The thick layers above and below the pipestone contained mostly silt and became quartzite. But the thin layer between was composed of fine clay - the reason the pipestone can be so easily worked.

The quartzite and pipestone layers visible here - and another thick layer of quartzite below them - dip toward the east at a 5-10 degree angle. As pipestone quarrying continues, an ever increasing quantity of the upper quartzite must be removed.
Details
HM NumberHM28R3
Tags
Placed ByPipestone National Monument, National Park Service, & US Department of the Interior
Marker ConditionNo reports yet
Date Added Sunday, June 24th, 2018 at 10:05pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)14T E 714420 N 4876805
Decimal Degrees44.01308333, -96.32501667
Degrees and Decimal MinutesN 44° 0.785', W 96° 19.501'
Degrees, Minutes and Seconds44° 0' 47.1" N, 96° 19' 30.06" W
Driving DirectionsGoogle Maps
Area Code(s)507, 605
Closest Postal AddressAt or near Circle Trail, Pipestone MN 56164, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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