Crough Seamount
25°00′S 121°12′W / 25°S 121.2°W
The seamount appears to be part of a long geological lineament with the neighbouring Henderson and Ducie islands, as well as the southern Tuamotus and Line Islands. Such a lineament may have been generated by a hotspot; the nearby Easter hotspot is a candidate hotspot.
Geology and geomorphology
Regional
The region lies between and around the islands of
There is a topographic
Crough seamount was probably formed by the Easter hotspot that also generated Easter Island[7] albeit with the participation of a nearby fracture zone[8] that modified the trend of the hotspot path.[9] In this case the Easter Island-Sala y Gomez ridge and the Crough Seamount would be conjugate volcanic ridges paired across the East Pacific Rise.[10] although it is possible that two separate hotspots were active on the eastern and western side of the East Pacific Rise.[11][12] Another theory postulates that Crough was formed by its own hotspot, the Crough hotspot.[13]
Together with
Local
Crough is an east-west trending seamount
A second seamount lies nearby and partly overlaps with Crough,
Composition
Dredging has yielded both vesicular and porphyritic
Eruption history
In 1955, a strong
References
- ^ a b Spencer 1989, p. 3.
- OCLC 896746178.
- ^ a b c Hekinian et al. 1995, p. 376.
- ^ a b Hekinian et al. 1995, p. 377.
- ^ Spencer 1989, p. 6.
- ^ Hekinian et al. 1995, p. 389.
- ^ Spencer 1989, p. 5.
- ^ Searle, Francheteau & Cornaglia 1995, p. 397.
- ^ a b Searle, Francheteau & Cornaglia 1995, p. 417.
- ^ O'Connor, Stoffers & McWilliams 1995, p. 208.
- ^ Morgan & Morgan 2007, p. 51.
- ^ a b c Morgan & Morgan 2007, p. 71.
- ^ Binard et al. 1996, p. 24.
- ^ ISBN 9781139497800.
- ^ Vacher & Quinn 1997, p. 410.
- .
- ^ a b Pockalny et al. 2021, p. 1361.
- ^ Pockalny et al. 2021, p. 1360.
- ^ Binard et al. 1996, p. 34.
- ISSN 1674-9871.
- ^ a b Hekinian et al. 1995, p. 380.
- ^ a b c Binard et al. 1996, p. 27.
- ^ Vacher & Quinn 1997, p. 407.
- ^ Binard et al. 1996, p. 31.
- ^ .
- ^ Binard et al. 1996, p. 26.
- ^ Searle, Francheteau & Cornaglia 1995, p. 400.
- ^ Hekinian et al. 1995, p. 379.
- ^ Hekinian et al. 1995, p. 382.
- ^ O'Connor, Stoffers & McWilliams 1995, pp. 206–207.
- ^ Binard et al. 1996, p. 25.
- ^ a b Talandier & Okal 1987, p. 946.
- ^ Talandier & Okal 1987, p. 945.
Sources
- Binard, N.; Stoffers, P.; Hékinian, R.; Searle, R.C. (October 1996). "Intraplate en echelon volcanic ridges in the South Pacific west of the Easter microplate". Tectonophysics. 263 (1–4): 23–37. ISSN 0040-1951.
- Hekinian, Roger; Stoffers, Peter; Akermand, Dietrich; Binard, Nicolas; Francheteau, Jean; Devey, Colin; Garbe-Schönberg, Dieter (August 1995). "Magmatic evolution of the Easter microplate-Crough Seamount region (South East Pacific)". Marine Geophysical Researches. 17 (4): 375–397. S2CID 129757272.
- Morgan, W. Jason; Morgan, Jason Phipps (2007). "Plate velocities in hotspot reference frame: electronic supplement" (PDF). geosociety.org. doi:10.1130/2007090.
- O'Connor, John M.; Stoffers, Peter; McWilliams, Michael O. (December 1995). "Time-space mapping of Easter Chain volcanism". Earth and Planetary Science Letters. 136 (3–4): 197–212. ISSN 0012-821X.
- Okal, Emile A.; ISSN 0012-821X.
- Pockalny, Robert; Barth, Ginger; Eakins, Barry; Kelley, Katherine A.; Wertman, Christina (1 November 2021). "Multiple melt source origin of the Line Islands (Pacific Ocean)". Geology. 49 (11): 1358–1362. doi:10.1130/G49306.1.
- ISSN 0012-821X.
- Spencer, T. (1989). "Tectonic and environmental histories in the Pitcairn Group, Palaeogene to present: reconstructions and speculations". Atoll Research Bulletin. 322: 1–22. hdl:10088/5906.
- Talandier, Jacques; Okal, Emile A. (1987). "Seismic detection of underwater volcanism: The example of French Polynesia". Pure and Applied Geophysics. 125 (6): 919–950. S2CID 128415828.
- Vacher, Leonard H. L.; Quinn, Terrence M. (1997-12-19). Geology and hydrogeology of carbonate islands. Elsevier. ISBN 9780080532479.