Wikimedi'Òc

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

Limestones (Big Horse Limestone Member, Orr Formation, Cambrian; Little Horse Canyon, House Range, Utah, USA) (45026593624).jpg - Lu Brito

Limestones (Big Horse Limestone Member, Orr Formation, Middle Cambrian-Upper Cambrian boundary; Little Horse Canyon, House Range, Utah, USA) 1 (44837817195).jpg - Lu Brito

Stromatolitic limestone (Big Horse Limestone Member, Orr Formation, Middle Cambrian; Orr Ridge, House Range, Utah, USA) 3 (44840227425).jpg - Lu Brito

Stromatolitic limestone (Big Horse Limestone Member, Orr Formation, Middle Cambrian; Orr Ridge, House Range, Utah, USA) 2 (45703485492).jpg - Lu Brito

Stromatolitic limestone (Big Horse Limestone Member, Orr Formation, Middle Cambrian; Orr Ridge, House Range, Utah, USA) 1 (45028778714).jpg - Lu Brito