The ravines of Des Moines Creek and Massey Creek deeply incise this broad slope. If runoff continue to incise and enlarge rills, they may eventually grow to become gullies. These incise underlying rhyolitic rock, depositing a coarse conglomerate known as the Bielstein Conglomerate. Neighbouring canyons have begun to incise the edifice. Cachapoal River begun to incise in the rising Andes in the Miocene epoch. The traditional treatment is to incise the vagina. Previously, any letter or symbol had been called a "sarat" (from "*sar" "incise").