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Coral Reefs of the USA by Bernhard M. Riegl, Richard E. Dodge (auth.), Bernhard M.

By Bernhard M. Riegl, Richard E. Dodge (auth.), Bernhard M. Riegl, Richard E. Dodge (eds.)

Coral Reefs of the us presents an entire evaluation of the current prestige of data relating to all coral reef parts in the united states and its territories. it's written by means of the main skilled gurus of their fields and geographic parts. Stretching from the Caribbean to the western Pacific, the coral reefs of the united states span large geographic and biotic variety, take place in a large choice of geomorphological settings, and supply a consultant cross-section of Holocene reef-building. This booklet will accordingly be of vast normal curiosity. For the 1st time, whole scholarly stories are given for the geology, geomorphology and the biology of reefs encompassing an unlimited region stretching from the Mariana Islands within the west, Samoa within the south, Hawaii within the north and the Virgin Islands within the east. This ebook isn't really a standing record, yet will supply up to date information regarding stressors and the biotic responses of the reefs, in addition to the geological reasons why those reefs exist within the first position. it will likely be a useful baseline-reference for all people who find themselves engaged in learn or administration of those coral reefs or to people who easily get pleasure from being well-informed approximately the most iconic ecosystems of the USA.

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1990). However, the ¶18O curve shows the interval of prolonged exposure of the higher-elevation paleoplatform interior was longer (>100 ka) and continued from the time the substage-5e sea abandoned the shelf (~112 ka) to the time the Holocene sea again submerged the 2. Controls on Late Quaternary Coral Reefs of the Florida Keys 23 Primary Terms and Geomorphic Features shelf margin Time (ka)/ relative sea level bank, shelf, platform outer shelf inner shelf mangroves Florida Keys nearshore rock ledge fossil & modern outer-shelf reefs & backreef trough sea level ~125 ka Florida Bay present sea level ledge begins to erode ~4 ka lagoon 1 patch reefs shelf-margin reef backreef trough 2 Hawk Channel 3 Straits of Florida upper slope 6 5 4 outlier reef Pleistocene bedrock 7 upper-slope terrace ~Depth Scale 1 Shallow inland lagoons or embayments (Florida and Biscayne Bays) 2 Emergent marine-isotope substage 5e (~125 ka) Key Largo Limestone (coral facies) and Miami Limestone (ooid tidal-bar facies) .

Field observations in 2002 found that most corals including hydrocorals were dead. b Cross section of Looe Key Reef (LK) shows the Holocene reef began accretion on the crest of a Pleistocene topographic high resulted today in a complete shift in offshore benthic communities as non-framework-building organisms characteristic of hardbottoms have replaced reefframework-building corals (Fig. 18a–h; Lidz and Hallock 2000; Shinn et al. 2003; Shifting Baselines 2005; Lidz et al. 2007). With tidally induced influx of deleterious coastal, bay, and gulf waters, the stressed reefs have succumbed.

The Miami Limestone, oolitic tidal bars normal to the margin, forms the lower Keys. Both formations are well dated to the highstand of ~125 ka (Multer et al. 2002). The Key Largo reef extends from beneath Miami Beach, where its elevation is below sea level, to Soldier Key, where it makes its first appearance as an island, to the Newfound Harbor Keys, where the reef last appears as islands, to the Dry Tortugas, where it is again submerged (Shinn et al. 1977). Core borings around the Marquesas Keys and scattered rock samples collected west of those islands show the Miami Limestone oolite extends westward into the Gulf of Mexico and may reach as far as Halfmoon Shoal (Shinn et al.

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