Reference: Howard, J.M. (2007) Mineral Species of Arkansas – a digest. Arkansas Geological Commission, Bulletin 23, Revision of 1987 edition, 140 pages.

ⓘ Chamosite

Formula: (Fe²⁺)₅Al(Si,Al)₄O₁₀(OH,O)₈

Reference: Howard, J.M. (2007) Mineral Species of Arkansas – a digest. Arkansas Geological Commission, Bulletin 23, Revision of 1987 edition, 140 pages.

ⓘ 'Chlorite Group'

Localities:

Iron Springs Mine, Perry County, Arkansas, USA
Game Preserve Mine, Perry County, Arkansas, USA

Description: Occurs in quartz veins in Stanley Shale.

Reference: Rocks & Min.:63:115; Engel(1952).

ⓘ Cookeite

Formula: (LiAl₄◻)[AlSi₃O₁₀](OH)₈

Reference: Howard, J.M. (2007) Mineral Species of Arkansas – a digest. Arkansas Geological Commission, Bulletin 23, Revision of 1987 edition, 140 pages.

ⓘ Dickite

Formula: Al₂(Si₂O₅)(OH)₄

Locality: Hollis Road Metal Quarry, Hollis, Perry County, Arkansas, USA

Description: Occurts in quartz veins in Jackfork Sandstone.

Reference: Rocks & Min.:63:115; Miser & Milton(1964).

ⓘ Fluorapatite

Formula: Ca₅(PO₄)₃F

Reference: Howard, J.M. (2007) Mineral Species of Arkansas – a digest. Arkansas Geological Commission, Bulletin 23, Revision of 1987 edition, 140 pages.

ⓘ Goethite

Formula: α-Fe³⁺O(OH)

Locality: Iron Springs Mine, Perry County, Arkansas, USA

Description: Occurs in quartz veins in Stanley Shale.

Reference: Rocks & Min.:63:115; Engel(1952).

ⓘ Kaolinite

Formula: Al₂(Si₂O₅)(OH)₄

Reference: j. Michael Howard (2007) Mineral Species of Arkansas ; Arkansas Geological Commission Bulletin 23

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

Reference: J. Michael Howard (2007) Mineral Species of Arkansas ; Arkansas Geological Commission Bulletin 23

ⓘ Quartz

Formula: SiO₂

Localities:

Game Preserve Mine, Perry County, Arkansas, USA
Iron Springs Mine, Perry County, Arkansas, USA
Deckard Mountain Quartz Deposit, Deckard Mountain, Nimrod, Perry County, Arkansas, USA
Hollis Road Metal Quarry, Hollis, Perry County, Arkansas, USA

Description: Occurs in quartz veins in Jackfork Sandstone.

Reference: Rocks & Min.:63:115; Engel(1952).

ⓘ Quartz var. Rock Crystal

Formula: SiO₂

Localities:

Description: Occurs in quartz veins in Jackfork Sandstone.

Reference: Rocks & Min.:63:115; Engel(1952).

ⓘ Rectorite

Formula: (Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O

Localities:

Deckard Mountain Quartz Deposit, Deckard Mountain, Nimrod, Perry County, Arkansas, USA
Hollis Road Metal Quarry, Hollis, Perry County, Arkansas, USA

Description: Occurs in quartz veins in Jackfork Sandstone.

Reference: Rocks & Min.:63:115; Engel(1952).

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Goethite	4.00.	α-Fe³⁺O(OH)
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	var. Rock Crystal	4.DA.05	SiO₂
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Fluorapatite	8.BN.05	Ca₅(PO₄)₃F
Group 9 - Silicates
ⓘ	Beidellite	9.EC.40	(Na,Ca_0.5)_0.3Al₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O
ⓘ	Chamosite	9.EC.55	(Fe²⁺)₅Al(Si,Al)₄O₁₀(OH,O)₈
ⓘ	Cookeite	9.EC.55	(LiAl₄◻)[AlSi₃O₁₀](OH)₈
ⓘ	Dickite	9.ED.05	Al₂(Si₂O₅)(OH)₄
ⓘ	Kaolinite	9.ED.05	Al₂(Si₂O₅)(OH)₄
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Rectorite	9.EC.60	(Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O
Unclassified Minerals, Rocks, etc.
ⓘ	'Chlorite Group'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Rectorite	(Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O
H	ⓘ Dickite	Al₂(Si₂O₅)(OH)₄
H	ⓘ Goethite	α-Fe³⁺O(OH)
H	ⓘ Cookeite	(LiAl₄◻)[AlSi₃O₁₀](OH)₈
H	ⓘ Beidellite	(Na,Ca_0.5)_0.3Al₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O
H	ⓘ Chamosite	(Fe²⁺)₅Al(Si,Al)₄O₁₀(OH,O)₈
H	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Li	Lithium
Li	ⓘ Cookeite	(LiAl₄◻)[AlSi₃O₁₀](OH)₈
O	Oxygen
O	ⓘ Quartz var. Rock Crystal	SiO₂
O	ⓘ Rectorite	(Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O
O	ⓘ Dickite	Al₂(Si₂O₅)(OH)₄
O	ⓘ Goethite	α-Fe³⁺O(OH)
O	ⓘ Cookeite	(LiAl₄◻)[AlSi₃O₁₀](OH)₈
O	ⓘ Quartz	SiO₂
O	ⓘ Beidellite	(Na,Ca_0.5)_0.3Al₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O
O	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Chamosite	(Fe²⁺)₅Al(Si,Al)₄O₁₀(OH,O)₈
O	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
F	Fluorine
F	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Na	Sodium
Na	ⓘ Rectorite	(Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O
Na	ⓘ Beidellite	(Na,Ca_0.5)_0.3Al₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Al	Aluminium
Al	ⓘ Rectorite	(Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O
Al	ⓘ Dickite	Al₂(Si₂O₅)(OH)₄
Al	ⓘ Cookeite	(LiAl₄◻)[AlSi₃O₁₀](OH)₈
Al	ⓘ Beidellite	(Na,Ca_0.5)_0.3Al₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Al	ⓘ Chamosite	(Fe²⁺)₅Al(Si,Al)₄O₁₀(OH,O)₈
Al	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	Silicon
Si	ⓘ Quartz var. Rock Crystal	SiO₂
Si	ⓘ Rectorite	(Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O
Si	ⓘ Dickite	Al₂(Si₂O₅)(OH)₄
Si	ⓘ Cookeite	(LiAl₄◻)[AlSi₃O₁₀](OH)₈
Si	ⓘ Quartz	SiO₂
Si	ⓘ Beidellite	(Na,Ca_0.5)_0.3Al₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Si	ⓘ Chamosite	(Fe²⁺)₅Al(Si,Al)₄O₁₀(OH,O)₈
Si	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
P	Phosphorus
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
K	Potassium
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Rectorite	(Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O
Ca	ⓘ Beidellite	(Na,Ca_0.5)_0.3Al₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Fe	Iron
Fe	ⓘ Goethite	α-Fe³⁺O(OH)
Fe	ⓘ Chamosite	(Fe²⁺)₅Al(Si,Al)₄O₁₀(OH,O)₈

Fossils

There are 1 fossil localities from the PaleoBioDB database within this region.

BETA TEST - These data are provided on an experimental basis and are taken from external databases. Mindat.org has no control currently over the accuracy of these data.

Occurrences

Youngest Fossil Listed

485 Ma (Early/Lower Ordovician)

Oldest Fossil Listed

501 Ma (Cambrian)

Stratigraphic Units

Unit	No. Occurrences	Age
Collier Shale - Unit 4	16	501 - 485.4 Ma (Cambrian)

Fossils from Region

Click here to show the list.

Accepted Name	Hierarchy	Age
Buttsia genus	Animalia : Arthropoda : Trilobita : Ptychopariida : Catillicephalidae : *Buttsia*	501 - 485.4 Ma Cambrian
Comanchia genus	Animalia : Arthropoda : Trilobita : Asaphida : Idahoiidae : *Comanchia*	501 - 485.4 Ma Cambrian
Housia genus	Animalia : Arthropoda : Trilobita : Asaphida : Pterocephaliidae : *Housia*	501 - 485.4 Ma Cambrian
Pterocephalia genus	Animalia : Arthropoda : Trilobita : Asaphida : Pterocephaliidae : *Pterocephalia*	501 - 485.4 Ma Cambrian
Cliffia genus	Animalia : Arthropoda : Trilobita : Ptychopariida : Elviniidae : *Cliffia*	501 - 485.4 Ma Cambrian
Dellea genus	Animalia : Arthropoda : Trilobita : Ptychopariida : Dokimocephalidae : *Dellea*	501 - 485.4 Ma Cambrian
Irvingella genus	Animalia : Arthropoda : Trilobita : Ptychopariida : Elviniidae : *Irvingella*	501 - 485.4 Ma Cambrian
Kindbladia genus	Animalia : Arthropoda : Trilobita : Ptychopariida : Dokimocephalidae : *Kindbladia*	501 - 485.4 Ma Cambrian
Acrotretida order	Animalia : Brachiopoda : Lingulata : Acrotretida	501 - 485.4 Ma Cambrian
Echinodermata phylum	Animalia : Echinodermata	501 - 485.4 Ma Cambrian
Conodonta class	Animalia : Chordata : Conodonta	501 - 485.4 Ma Cambrian
Pseudagnostus communis species	Animalia : Arthropoda : Trilobita : Agnostida : Diplagnostidae : Pseudagnostus : *Pseudagnostus communis*	501 - 485.4 Ma Cambrian
Linguloidea superfamily	Animalia : Brachiopoda : Lingulata : Lingulida : Linguloidea	501 - 485.4 Ma Cambrian
Cheilocephalus brachyops species	Animalia : Arthropoda : Trilobita : Corynexochida : Cheilocephalidae : Cheilocephalus : *Cheilocephalus brachyops*	501 - 485.4 Ma Cambrian
Pseudokingstonia exotica species	Animalia : Arthropoda : Trilobita : Corynexochida : Cheilocephalidae : Pseudokingstonia : *Pseudokingstonia exotica*	501 - 485.4 Ma Cambrian
Xenocheilos minutum species	Animalia : Arthropoda : Trilobita : Ptychopariida : Norwoodiidae : Xenocheilos : *Xenocheilos minutum*	501 - 485.4 Ma Cambrian

Fossil Localities

Click to show 1 fossil locality

USA

Arkansas
- Perry County
  - Cambrian🐚 Collier Shale

Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Perry_County,_Arkansas
Wikidata ID:	Q61131
GeoNames ID:	4125858

Localities in this Region

Other Regions, Features and Areas that Intersect

North America PlateTectonic Plate

Arkoma Basin–Ouachita Thrust BeltBasin
Sabine DomainDomain
Shawnee DomainDomain

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Detailed Mineral List:

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List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

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