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Sea-based blowhole Land-based blowhole. In geology, a blowhole or marine geyser is formed as sea caves grow landward and upward into vertical shafts and expose themselves toward the surface, which can result in hydraulic compression of seawater that is released through a port from the top of the blowhole. [1]
A blowhole is a cavity formed when a joint between a sea cave (formed by erosion) and the land surface above the cave becomes enlarged. The sea cave and the land surface become conjoined when the roof of the cave collapses. Blowholes are formed by the process of erosion.
The blowholes at Dolomite Point, Punakaiki have been formed through combined processes of erosion. The action of waves, combined with karst erosion in joints and faults in the limestone rock, leads to the creation of caverns that become sea caves. When the sea cave erodes upwards and towards the land, it can create an opening to the surface.
The Hālona Blowhole was formed thousands of years ago during the period of volcanic activity in Oahu, [8] with Koko Crater's lava flowing into the ocean. [9] The lava tubes extend into the ocean which are narrow at the top. [9]
Nakalele blowhole Watch a movie of the blowhole "erupting". Closeup of Nakalele Blowhole Warning sign at Nakalele Point. Nakalele Point is a land mass on the eastern edge of the northern tip of the island of Maui in the state of Hawaiʻi.
Cape (geography) Cascadia Channel; Channel (geography) Chenier; Chevron (land form) Cliff; Cliff-top dune; Cliffed coast; Coast; Coastal plain; Coastal waterfall; Cold seep; Continental shelf; Continental shelf of Chile; Coral reef; Cowaramup Bombora; Cuspate foreland; Cyclic steps
The Alofaaga Blowholes, also known as the Taga Blowholes, are a natural feature located in the district of Palauli, south west of Salelologa wharf on the island of Savai'i in Samoa. The entrance to the blowholes is in the village of Taga .
Calder's Geo, Shetland Geo of Sclaites at Duncansby Head, Caithness. A geo or gio (/ ɡ j oʊ / GYOH, from Old Norse gjá [1]) is an inlet, a gully or a narrow and deep cleft in the face of a cliff.