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Country:
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USA 
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Province:
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Nevada, Clark Co. 
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Locality:
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Apex Section, about 10 mi. NE Las Vegas 
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Layer:
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Indian Springs Fm., above marker congl. | 
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Lower Boundary:
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RUS Nm1c1--Nm1c2(uralicus--Del.bressoni), 322 million years
 
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Upper Boundary:
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UAR Upper Pitkin--Imo Formation, 321 million years
 
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Georeference:
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