By Anneleen Foubert
The discovery of modern carbonate mounds and cold-water coral reefs alongside the eu continental margins is an enormous fulfillment of the prior decade. diversified study tasks were constructed, fueling shiny debates. The pursuits of this examine, which rides the wave of contemporary carbonate mound and cold-water coral learn, are twofold: (1) to explain for the 1st time in historical past the character and inner constitution of a complete carbonate mound physique, from base to most sensible, and (2) to debate the importance of the new carbonate mound list. Challenger Mound, localized in Porcupine Seabight SW of eire, has been drilled in the course of IODP excursion Leg 307 "Modern Carbonate Mounds: Porcupine Drilling". The got mound list is in comparison with different mound constructions in Porcupine Seabight and with a cluster of mounds within the Gulf of Cadiz, alongside the Moroccan margin. during this method, the authors spotlight that fresh carbonate mounds shape a particular and critical classification in the wide selection of various deep-water carbonate systems.
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Additional resources for Nature and Significance of the Recent Carbonate Mound Record: The Mound Challenger Code
3, 4, and 5. 1 represents the geographical coordinates and the technical characteristics of Holes U1317A, U1317B, U1317C and U1317E. During IODP Expedition Leg 307, three standard coring systems were used: the advanced piston corer (APC), the extended core barrel (XCB) and the rotary core barrel (RCB). 5 m long oriented core samples from very soft to firm sediments that cannot be recovered well by rotary coring (Fig. 14A). The APC inner core barrel is run to bottom on the coring wireline. 5 m into the sediment.
2005). A Mid Miocene onset or acceleration of Norwegian Deep Water Overflow is proposed by Stoker et al. (2005) to explain a regional expansion in contourite drift development and accumulation above the C20 unconformity. The Early Neogene onset or acceleration of overflow of Norwegian Sea Deep Water (NSDW) is interpreted to be a consequence of a tectonic inversion in the Faroe-Shetland areas, which changed the geometry of the Wyville-Thomson Ridge complex so as to facilitate the opening of the Faroe conduit as passageway for the exchange of intermediate and deep-water masses between the Atlantic Ocean and Nordic Seas (Stoker et al.
2007a,b). The different described units and unconformities are annotated. The location of the described seismic profile is noted on Figs. 1 Site Survey 25 (Fig. 6). Seismic unit U4 is interpreted as an elongated sediment drift, which started to develop in Porcupine Seabight during Late Eocene to Early Oligocene times (Van Rooij 2004). This unit can be correlated to the lower part of megasequence RPc (Stoker et al. 2005) and the base of unit U4 can be linked with the C30 unconformity (McDonnell 2001), marking the onset of drift sedimentation probably driven by Tethyan Outflow Water in Porcupine Basin.