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Limestones (Big Horse Limestone Member, Orr Formation, Middle Cambrian-Upper Cambrian boundary; Little Horse Canyon, House Range, Utah, USA) 2 (44837826135).jpg - Lu Brito
Stromatolitic limestone (Big Horse Limestone Member, Orr Formation, Middle Cambrian; Orr Ridge, House Range, Utah, USA) 3 (44840227425).jpg - Lu Brito
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