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Beachrock meteoric cements

Hanor J.S. (1978) Precipitation of beachrock cements Mixing of marine and meteoric waters vs. CO2 degassing. J. Sediment. Petrol. 48,489-501. [Pg.634]

Figure 11.1 Photographs of beachrock outcrops. (A) Seaward dipping layers of beachrock on the northwest coast of Basse Terre, Guadeloupe, West Indies. This is the area that Charles Lyell (1832) mentioned in his Principles of Geolog/. Beachrock consists largely of quartz and volcanic sand cemented by calcium carbonate. (B) Extensive outcrop of beachrock, which also exhibits significant erosion. Windward side of Halfmoon Cay, Lighthouse Reef, Belize. (C) Beachrock ridge on southern shore of Kuramathi island, Rasdu Atoll, Maldives. Note flat and karstified top of outcrop, which resulted from meteoric dissolution. Figure 11.1 Photographs of beachrock outcrops. (A) Seaward dipping layers of beachrock on the northwest coast of Basse Terre, Guadeloupe, West Indies. This is the area that Charles Lyell (1832) mentioned in his Principles of Geolog/. Beachrock consists largely of quartz and volcanic sand cemented by calcium carbonate. (B) Extensive outcrop of beachrock, which also exhibits significant erosion. Windward side of Halfmoon Cay, Lighthouse Reef, Belize. (C) Beachrock ridge on southern shore of Kuramathi island, Rasdu Atoll, Maldives. Note flat and karstified top of outcrop, which resulted from meteoric dissolution.
Cements from meteoric waters may develop in beachrock during precipitation from percolating calcium-carbonate-saturated rain water during low... [Pg.371]

Figure 11.7 Scanning electron microscopy images of marine beachrock and meteoric cayrock cements. (A) Blades of high-magnesium calcite on constituent particles in beachrock. Northeast Sapodilla Cay, southern Belize Barrier Reef. (B) Dissolution cavity is lined with blockyand bladed low-magnesium calcite in cayrock. Cay Bokel, Turneffe Islands, Belize. (C) Low-magnesium calcite needle fibre (whisker) cement in cayrock. Harry Jones Point, Turneffe Islands, Belize. Figure 11.7 Scanning electron microscopy images of marine beachrock and meteoric cayrock cements. (A) Blades of high-magnesium calcite on constituent particles in beachrock. Northeast Sapodilla Cay, southern Belize Barrier Reef. (B) Dissolution cavity is lined with blockyand bladed low-magnesium calcite in cayrock. Cay Bokel, Turneffe Islands, Belize. (C) Low-magnesium calcite needle fibre (whisker) cement in cayrock. Harry Jones Point, Turneffe Islands, Belize.
See other pages where Beachrock meteoric cements is mentioned: [Pg.371]    [Pg.375]    [Pg.377]    [Pg.369]    [Pg.375]    [Pg.380]    [Pg.382]    [Pg.484]   
See also in sourсe #XX -- [ Pg.371 , Pg.374 , Pg.375 , Pg.376 ]



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