Jasper Hill (Jasper Knob), Ishpeming, Marquette iron range, Marquette Co., Michigan, USA
|Latitude & Longitude (WGS84):||46° 29' 9'' North , 87° 39' 18'' West|
|Latitude & Longitude (decimal):||46.48583,-87.65500|
|Köppen climate type:||Dfb : Warm-summer humid continental climate|
A bald-topped hill within the city of Ishpeming composed entirely of jaspilite, or more properly, banded hematite and jasper. To visit the hill, follow the stone steps through the wall and woods opposite the homes on Hill Street, near the intersection of Hill and Jasper streets.
2 valid minerals.
Rock Types Recorded
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Entries shown in red are rocks recorded for this region.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
1600 - 2500 Ma
|Menominee Group; Negaunee Iron-formation|
Age: Proterozoic (1600 - 2500 Ma)
Stratigraphic Name: Negaunee Iron Formation
Description: Highly metamorphosed banded iron-formation. Principal iron-formation in Marquette trough and nearby areas. Includes abundant metadiabase sills.
Comments: Continental margin assemblage (north of Niagara Fault)
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052.