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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Biotite from
Poole's Point, Dromedary Complex, Dampier Co., New South Wales, Australia


Locality type:Point
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Age information
Maximum recorded age:93 ± 2 Ma
Minimum recorded age:93 ± 2 Ma
Sample ages:
Recorded ageGeologic TimeSampleDating method
193 ± 2 MaLate/Upper Cretaceous -
Sample references:
1 -
McDougall, I., & Wellman, P. (1976). Potassium?argon ages for some Australian Mesozoic igneous rocks. Journal of the Geological Society of Australia, 23(1), 1-9.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Poole's Point, Dromedary Complex, Dampier Co., New South Wales, Australia
Data Identifiers
Mindat Occurrence Record ID:1367866
Long-form Identifier:1:3:1367866:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
4.1km (2.5 miles) ⓘLittle Dromedary Intrusion, Dromedary Complex, Dampier Co., New South Wales, Australia
8.5km (5.3 miles) ⓘMount Dromedary Intrusion, Dromedary Complex, Dampier Co., New South Wales, Australia
32.6km (20.3 miles) ⓘMoloneys Copper show, Brogo, Auckland Co., New South Wales, Australia
36.1km (22.4 miles) ⓘTanja Complex, Dampier Co., New South Wales, Australia
42.4km (26.3 miles) ⓘFrancis Hill Mine (Foremans lode), Moruya, Dampier Co., New South Wales, Australia
42.9km (26.7 miles) ⓘDonkey Hill Mine (Golden reef), Moruya, Dampier Co., New South Wales, Australia
43.6km (27.1 miles) ⓘRobinsons Copper show, Bemboka, Auckland Co., New South Wales, Australia
43.6km (27.1 miles) ⓘScotland Yard Copper show, Bega, Auckland Co., New South Wales, Australia
50.4km (31.3 miles) ⓘMogendoura Mine, St Vincent Co., New South Wales, Australia
57.1km (35.5 miles) ⓘJ.K. Mine, Bemboka, Auckland Co., New South Wales, Australia
References
Brown, I. A. (1930). The geology of the south coast of New South Wales. Part iii. The monzonitic complex of the Mount Dromedary district. In Proc. Linn. Soc. NSW (Vol. 55, No. 5, pp. 637-695).
 
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