Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
Huron Shale Concretions, Huron River, Huron Co., Ohio, USA

Oldest recorded age at locality: 383
Youngest recorded age at locality: 359

mindat Locality ID: 266400
mindat URL: http://www.mindat.org/loc-266400.html

Tectonic Settings:

Total number of sublocalities beneath "Huron Shale Concretions, Huron River, Huron Co., Ohio, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

Baryte	Calcite	Marcasite	None	Oxalate	Pyrite	Quartz	Sphalerite

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Ba C Ca Fe H Mg O S Si Zn

Elements from minerals reported directly at this locality: Ba C Ca Fe H Mg O S Si Zn

Structural Groups for minerals in this locality:
Baryte Calcite Marcasite None Oxalate Pyrite Quartz Sphalerite

8 IMA Minerals at location:

Baryte ()*	Calcite ()*	Dolomite ()*	Marcasite ()*	Pyrite ()*
Quartz ()*	Sphalerite ()*	Whewellite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Baryte ()*	Baryte	Ba(SO₄)	383	359	11547
Calcite ()*	Calcite	Ca(CO₃)	383	359	27770
Dolomite ()*	None	CaMg(CO₃)₂	383	359	9895
Marcasite ()*	Marcasite	FeS₂	383	359	5674
Pyrite ()*	Pyrite	FeS₂	383	359	39462
Quartz ()*	Quartz	SiO₂	383	359	61156
Sphalerite ()*	Sphalerite	ZnS	383	359	21482
Whewellite ()*	Oxalate	Ca(C₂O₄)·H₂O	383	359	66

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Michelle_000573	Concretions bearing whewellite are found in the marine Ohio and Olentangy shales, Ohio. Concretions are described as septarian limestone and often fossiliferous, commonly from one to three feet in diameter. Other minerals within the concretions include fluorescent calcite, dolomite, ankerite, barite, marcasite, quartz and sphalerite. These concretions are found throughout the Devonian Ohio shales.

Age ID

Locality Notes

Michelle_000573

Concretions bearing whewellite are found in the marine Ohio and Olentangy shales, Ohio. Concretions are described as septarian limestone and often fossiliferous, commonly from one to three feet in diameter. Other minerals within the concretions include fluorescent calcite, dolomite, ankerite, barite, marcasite, quartz and sphalerite. These concretions are found throughout the Devonian Ohio shales.

1 Ages assigned to this locality:

	Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	Michelle_000573	383	359	Upper Devonian		Age of Ohio Shale							Whewellite		266400	Huron Shale Concretions, Huron River, Huron Co., Ohio, USA	Huron Shale Concretions	Hyde and Landy (1966)		AM51_228	Age of concretion bearing Ohio Shale. "...The Huron River cuts through flat-lf ing beds of the marine Ohio and Olentangy shales of Upper Devonian age."

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...