By Maurice E. Tucker, James Lee Wilson, Paul D. Crevello, J. Rick Sarg, J. Fred Read
This quantity additionally discusses the pc modelling of carbonate cycles and series research. this can end up a useful textual content for senior undergraduate and postgraduate scholars within the earth sciences mostly and also will be of worth to the pro researcher. Carbonate structures includes contributions from a global authorship and the quantity has been edited through the most revered names within the earth sciences. parts lined comprise; early rifting deposition; examples from carbonate sequences of Sardinia (Cambrian) and Tuscany ( Triassic-Jurassic), Italy; geometry and evolution of platform-margin bioclastic shoals, overdue Dinantian (Mississippian), Derbyshire, united kingdom; cyclic sedimentation in cabonate and combined carbonate/clastic environments; 4 simulation courses for a computer desktop; center Triassic carbonate ramp platforms within the Catalan foundation, N.E. Spain; facies, cycles, depositional sequencies and controls; phases within the evolution of overdue Triassic and Jurassic platform carbonates; western margin of the Subalpine basin, Ardech, France. The formation and drowning of remoted carbonate systems; tectonic and ecologic keep watch over of the Northern Apennines; controls on higher Jurassic carbonate building up improvement within the Lusitanian Basin, Portugal; Hauterivian to decrease Aptian carbonate shelf sedimentation and series stratigraphy within the Jura and northerly Subalpine chains (southeastern France and Swiss Jura); basement structural controls on Mesozoic carbonate facies in northeastern Mexico; the Aptian-Albian carbonate episode of the Basque-Cantabrian foundation (Northern Spain); normal features, controls and evolution; reaction of the Arabian carbonate platform margin slope to orogenic last of an ocean basin, Cretaceous, Oman,
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Extra info for Carbonate Platforms: Facies, Sequences and Evolution (IAS Special Publication 9)
The fracturing and drowning of the Massiccio and Ceroide platforms are regarded by the authors as the first sign of rifting (Bernoulli et al. , 1979; Carannante et al. , 1984}. However, the depositional behaviour of the Lower Cambrian and Upper Triassic-Jurassic sequences suggests that earlier ex ' tensional movements controlled both the detachment of the platforms and their internal stratigraphy during growth. Therefore they can be interpreted as indicative of the very beginning of continental rifting.
In contrast to microfacies 1, microfacies 2 was subject to a higher sedimentation rate which did not allow sufficient time for micritization to take place. Bedload transport and winnowing are suggested by the orientation of bioclasts and stacking of shells. As in microfacies 1 the radial-fibrous calcite cement is interpreted as a marine phreatic cement. Interpretation This microfacies contains a similar allochem assem blage to microfacies 1 and 2 and represents fully marine conditions. The disarticulation and fragmen tation of bioclasts suggests a high-energy environ ment.
Pkst. -wkst. Microfacies 4 Bioclast wkst. , � ;:;· o- s· [. Allochems in some samples Common � s, c Foraminifera (tetrataxids, agglutinating types, earlandids) Algae (stachenids) Molluscs (bivalves and gastropods) Types A, B and C intraclasts Algae (stachenids) Foraminifera (archaediscids) Oncolite Type C intraclast Mollusc shell fragments Algae (kamaenids and ungdarellids) Foraminifera (earlandids, endothyrids and agglutinating types) Ostracods Foraminifera (archaediscids) Alg11e (stacheoides) Foraminifera (saccaminopsids) Oncolites Algae (kamaenids) Rugose and tabulate coral fragments Trilobite Calcitized monaxon spicules Ostracod valves Algae (green, indet.