Keweenawan gabbros, Bayfield Co., Wisconsin, USAi
| Regional Level Types | |
|---|---|
| Keweenawan gabbros | - not defined - |
| Bayfield Co. | County |
| Wisconsin | State |
| USA | Country |
| Latitude & Longitude (WGS84): | 46° 18' 29'' North , 90° 57' 15'' West |
|---|---|
| Latitude & Longitude (decimal): | 46.30833,-90.95417 |
| GeoHash: | G#: cbpr6q1jw |
| KΓΆppen climate type: | Dfb : Warm-summer humid continental climate |
Outcrops in the Mellen Intrusive Complex, consisting of gabbro, troctolite and granophyre. Location given is in the center of region of scattered outcrops in heavily wooded terrain in Sec. 25, 35, and 36 in T.45N R.5W and in Sec. 1-9, 11-13 and 16-18 in T.44N R.5W
Select Mineral List Type
Standard Detailed Strunz Dana Chemical ElementsDetailed Mineral List:
| β 'Albite-Anorthite Series' Reference: Leighton, M. W. (1954) Petrogenesis of a gabbro - granophyre complex in northern Wisconsin" Geological Society of America Bulletin: 65: 401-442. |
| β Augite Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6 Reference: Leighton, M. W. (1954) Petrogenesis of a gabbro - granophyre complex in northern Wisconsin" Geological Society of America Bulletin: 65: 401-442. |
| β Clinozoisite Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH) Reference: Leighton, M. W. (1954) Petrogenesis of a gabbro - granophyre complex in northern Wisconsin" Geological Society of America Bulletin: 65: 401-442. |
| β 'Fayalite-Forsterite Series' Reference: Leighton, M. W. (1954) Petrogenesis of a gabbro - granophyre complex in northern Wisconsin" Geological Society of America Bulletin: 65: 401-442. |
| β 'Feldspar Group' Reference: Leighton, M. W. (1954) Petrogenesis of a gabbro - granophyre complex in northern Wisconsin" Geological Society of America Bulletin: 65: 401-442. |
| β 'Feldspar Group var: Perthite' Reference: Leighton, M. W. (1954) Petrogenesis of a gabbro - granophyre complex in northern Wisconsin" Geological Society of America Bulletin: 65: 401-442. |
| β Quartz Formula: SiO2 Reference: Leighton, M. W. (1954) Petrogenesis of a gabbro - granophyre complex in northern Wisconsin" Geological Society of America Bulletin: 65: 401-442. |
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| β | 'Quartz' | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| β | 'Augite' | 9.DA.15 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| β | 'Clinozoisite' | 9.BG.05a | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) |
| Unclassified Minerals, Rocks, etc. | |||
| β | 'Albite-Anorthite Series' | - | |
| β | 'Fayalite-Forsterite Series' | - | |
| β | 'Feldspar Group' | - | |
| β | 'var: Perthite' | - | |
List of minerals arranged by Dana 8th Edition classification
| Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups | |||
|---|---|---|---|
| Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2) | |||
| β | Clinozoisite | 58.2.1a.4 | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) |
| Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1) | |||
| Single-Width Unbranched Chains, W=1 with chains P=2 | |||
| β | Augite | 65.1.3a.3 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Group 75 - TECTOSILICATES Si Tetrahedral Frameworks | |||
| Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si | |||
| β | Quartz | 75.1.3.1 | SiO2 |
| Unclassified Minerals, Rocks, etc. | |||
| β | 'Albite-Anorthite Series' | - | |
| β | 'Fayalite-Forsterite Series' | - | |
| β | 'Feldspar Group' | - | |
| β | 'var: Perthite' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Clinozoisite | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) |
| O | Oxygen | |
| O | β Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| O | β Clinozoisite | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) |
| O | β Quartz | SiO2 |
| Mg | Magnesium | |
| Mg | β Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Al | Aluminium | |
| Al | β Clinozoisite | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) |
| Si | Silicon | |
| Si | β Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Si | β Clinozoisite | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) |
| Si | β Quartz | SiO2 |
| Ca | Calcium | |
| Ca | β Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Ca | β Clinozoisite | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) |
| Fe | Iron | |
| Fe | β Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Regional Geology
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
| Mesoproterozoic 1000 - 1600 Ma ID: 3190266 | Mesoproterozoic volcanic rocks Age: Mesoproterozoic (1000 - 1600 Ma) Comments: Mid-Continent Rift Lithology: Bimodal volcanic rocks Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154] |
| Mesoproterozoic 1000 - 1600 Ma ID: 3241903 | Mellen Complex Age: Mesoproterozoic (1000 - 1600 Ma) Stratigraphic Name: Mellen Complex Description: Dark-gray to black. Plagioclase laths up to 1 cm, commonly strongly oriented. Olivine generally abundant and apatite is common accessory. Abundant opaque minerals in places. Comments: Midcontinent rift province; intrusion; rift basin Lithology: Major:: {ferrodiorite} Reference: Cannon, W.F., L.G. Woodruff, S.W. Nicholson, C.A. Hedgman, and R.D. Barber-Delach. Digital Bedrock Geologic Map of the Ashland and Northern Part of the Ironwood 30' x 60' Quadrangles, Wisconsin and Michigan. U.S. Geological Survey Open-File Report 99-546. [162] |
| Stenian 1000 - 1200 Ma ID: 2801627 | Granophyre Age: Stenian (1000 - 1200 Ma) Description: Associated with Amnicon pluton and the Mellen complex Comments: Original map source: Cannon, W.F., Kress, T.H., Sutphin, D.M., Morey, G.B., Meints, Joyce, and Barber-Delach, Robert, 1997, Digital Geologic Map and mineral deposits of the Lake Superior Region, Minnesota, Wisconsin, Michigan: USGS Open-File Report 97-455 (version 3, Nov. 19 Lithology: Major:{granitic} 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. [133] |
Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License
References
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