Bimmah Sinkhole in Arabic, and hence the name. To preserve the sinkhole, the local municipality developed a park, Hawiyat Najm Park (Haweat Najm Park), around it, along with a stairway leading down to the lake. The original cavern formed in the limestone of the Abat formation which lies below the more massive Seeb formation. When the cavern grew too large the rocks of the Seeb collapsed into it forming a sinkhole. It formed so close to the sea because of the increased subterranean water flow that occurred down-gradient. Bimmah Sinkhole Bimmah Sinkhole (Arabic هـويـة نـجـم "Hawaiyat Najm") is a water-filled depression, structurally
Cedar Sink Cedar Sink Cedar Sink is a vertical-walled large depression, or sinkhole, in the ground, that is located in Edmonson County, Kentucky and contained within and managed by Mammoth Cave National Park. The sinkhole measures from the top sandstone plateau to the bottom of the sink and was caused by collapse of the surface soil. The landscape is karst topography, which means the region is influenced by the dissolution of soluble rocks. Sinkholes, caves, and dolines typically characterize these underground drainage systems. Cedar Sink has a bottom area of about and has more fertile soil compared to the ridgetops. The rocks