Utah State Park in the San Rafael Desert of Goblin Valley contains thousands of mushroom-shaped'hoodoos ' The gnarly rock formations are created through the erosion of Entrada sandstone deposited millions of years ago . Softer sedimentary rock material erodes more quickly , leaving the harder rock behind , creating unusual shape .
Goblin Valley State Park in the San Rafael Desert of Utah contains thousands of mushroom-shaped'hoodoos ' The gnarly rock formations are created through the erosion of Entrada sandstone deposited millions of years ago . Softer sedimentary rock material erodes more quickly , leaving the harder rock behind , creating unusual shape .