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:
Chyulu Hills, Makueni County, Kenya

mindat Locality ID: 274088
mindat URL: http://www.mindat.org/loc-274088.html

Tectonic Settings:

Total number of sublocalities beneath "Chyulu Hills, Makueni County, Kenya": 3
Total number of bottom-level sublocalities: 3

Number of Child Localities: 3
Child Localities:
Imperial Canyon Lava Tubes
Leviathan Cave
Mathaioni Cave

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.

Amorphous	Gypsum	Magnetoplumbite	None	Not in a structural group	Sapphirine	Spinel	Tridymite	Vivianite

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: Al Ca Ce H K Mg Na O P S Si Ti

Elements from minerals reported directly at this locality: Al Ca K Mg Na O Si

Structural Groups for minerals in this locality:
Amorphous Gypsum Magnetoplumbite None Not in a structural group Sapphirine Spinel Tridymite Vivianite

9 IMA Minerals at location:

Bobierrite ()*	Gypsum ()*	Hibonite ()*	Mullite ()*	Nepheline ()*
Opal ()*	Sapphirine ()*	Sillimanite ()*	Spinel ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Bobierrite ()*	Vivianite	Mg₃(PO₄)₂·8H₂O	1	77707	17
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	1	77709	6890
Hibonite ()*	Magnetoplumbite	CaAl₁₂O₁₉	0		80
Mullite ()*	None	Al_4+2xSi_2-2xO_10-x (x ≈ 0.4)	0		78
Nepheline ()*	Tridymite	Na₃K(Al₄Si₄O₁₆)	0		884
Opal ()*	Amorphous	SiO₂·nH₂O	1	77708	2994
Sapphirine ()*	Sapphirine	Mg₄(Mg₃Al₉)O₄[Si₃Al₉O₃₆]	0		129
Sillimanite ()*	Not in a structural group	Al₂SiO₅	0		1516
Spinel ()*	Spinel	MgAl₂O₄	0		1934

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...