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Maquoketa Shale, Gilead, Calhoun County, Illinois, USAi
Regional Level Types
Maquoketa ShaleFormation
GileadVillage
Calhoun CountyCounty
IllinoisState
USACountry

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PhotosMapsSearch
Latitude & Longitude (WGS84):
39° North , 90° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
Mindat Locality ID:
29577
Long-form identifier:
mindat:1:2:29577:1
GUID (UUID V4):
9480d562-ae78-474b-981e-3ab0d6a49818


Upper Ordovician formation.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


1 valid mineral. 1 (FRL) - first recorded locality of unapproved mineral/variety/etc.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Muscovite var. Illite (FRL)
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
Type Locality:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var. Illite (TL)9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2

List of minerals for each chemical element

HHydrogen
H Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
OOxygen
O Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
O MuscoviteKAl2(AlSi3O10)(OH)2
AlAluminium
Al Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
KPotassium
K Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Maquoketa_Group
Wikidata ID:Q6754343

Other Regions, Features and Areas containing this locality


This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
 
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