The Gate the Tide Cut Through Basalt
A Ming gazetteer saw a gate-shaped ridge and wind cave at Eman; geological research describes a passage eroded through basalt by the sea.
Longmen Jilang Sea Arch
A basalt sea arch in Eman whose gate-shaped outline appears in a Ming gazetteer and whose passage was formed by marine erosion.
In Eman Town on Danzhou’s northern coast, a cluster of names—Longmen Mountain, Longmen Jilang, Longmen Harbour and Longmen Village—shares the image of a gate. A provincial-government history article quotes the Ming Zhengde-era Qiongtai Gazetteer describing twin peaks reaching toward the sea and a hollow cave ventilated by sea wind. A Hainan University geological paper identifies Longmen Jilang as a Pleistocene-basalt marine-erosion arch, about 21 metres wide and 9 metres high. Folklore and geology offer different ways to read the opening in the rock.
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Waves wash the rocky shore below the vegetated cliff at Longmen Jilang, Danzhou.Photographer not credited on the source page · Rights unknown; selected under the established official-source policy Photo source ↗ Rights information ↗ The source photograph is retained at its native 1500 × 985 pixels. Display and thumbnail are reduced WebP derivatives; neither is enlarged. Photographer and explicit licence are not identified on the source page; rights remain unknown and the source is considered under the project’s accepted government-tourism-page policy.