Fitur bawah laut · Rekahan erupsi

Southern EPR-Segment J

Southern EPR at 18.2°S (Segment J)

Tipe: Rekahan erupsi
Ketinggian: 2650 m (bawah laut)
Letusan terakhir: 1890

Black smoker hydrothermal vents emitting high-chlorinity fluids were photographed at the "RM29" site at 18°10’S. This image was taken in November 1994 from the Japanese submersible Shinkai 6500. The axial crest of Segment J of the Southern East Pacific Rise consists of an asymmetrical shallow graben varying from 250 to 600 m wide with walls about 20 m high. · Foto: Image courtesy of NOAA Vents Program, 1994 (www.pmel.noaa.gov/vents/chemistry/images/).

Tipe: Rekahan erupsi
Negara: Fitur bawah laut
Wilayah: Pasifik Selatan / Southern East Pacific Rise Volcanic Province
Ketinggian: 2650 m (bawah laut)
Koordinat: -18.175, -113.350
Letusan terakhir: 1890
Kondisi tektonik: Zona rift / Kerak samudra (< 15 km)
Bentuk lahan: Gugusan gunung api
Batuan utama: Basal / Pikrobasal

Ringkasan geologi

The axial crest of Segment J of the Southern East Pacific Rise consists of an asymmetrical shallow graben varying from 250 to 600 m wide with walls about 20 m high. Horst and graben structures expose cooled lava lakes and both active and extinct hydrothermal chimneys. Basaltic lava flow fields, lava pillars, and pillow mounds are found on the floor of the graben. The largest lava flow field is the Moai lava flow at about 18°12'S. Two lava flows have been dated by paleomagnetic evidence at about 1820 and 1890 CE.

Riwayat letusan

2 tercatatGlosarium

Ringkasan (VEI dari waktu ke waktu)

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Garis waktu rinci

1890VEI 0Perkiraan geologi
1890-07-02 – akhir tidak diketahui
1820VEI 0Perkiraan geologi
1820-07-02 – akhir tidak diketahui

Gunung api terdekat

Tautan eksternal

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Halaman asli Smithsonian GVP

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