rocks interacting with moving water over long periods of time causes weathering
arenaceous_rock is sedimentary_rock. bouldering is rock_climbing. if_rock is very_hot_can_melt. treading_water is aquatic_body_movement. snow is crystalline_form_of_solid_water. rockiness is unevenness. groundmass is igneous_rock. phosphate_weathering is erosion. stand_underneath_when is raining_or_snowing. metamorphic_rock is rock.