Rabbit Ears Lamproite, Rabbit Ears Pass, Middle Park, Grand Co., Colorado, USA

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Small lamproite pluton exposed in the basalt-rhyolite province near Middle Park, Colorado. The Rabbit Ears Lamproite is Oligocene (33mya) in age and is not diamondiferous.

References:
Thompson, R. N., Velde, D., Leat, P. T., Morrison, M. A., Mitchell, J. G., Dickin, A. P., and Gibson, S. A. (1997). Oligocene lamproite containing an Al-poor, Ti-rich biotite, Middle Park, northwest Coloroado, USA. Mineralogical Magazine 61: 557-572.

Map Reference: 40°11'20"N , 105°57'19"W

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Mineral List:

Analcime
'Apatite'
Biotite

Diopside
Ilmenite
Phlogopite

Richterite

7 entries listed. 5 valid minerals.

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