Page 178 - Carbonate Platforms Facies, Sequences, and Evolution

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A " " A � ,-.. " "' " A -" A A A � " A A A A A � A A "' A A A / A ,lo.. A A / � /A� A" -'+ r- Calcare Massic?o- '-� - - -L.. I - I ' h-- of carbonate sediment production sea level warm fairly high salinity water escarpment forms due to high rate possible faulting, but no surface (Northern Apennines) (Central Apennines) Sibillini Mountains OF CARBONATE SEAMOUNTS IN THE NORTH
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(Northern Apennines)
formation of ooids
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Pal�ozoic clastics,
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Sibillini Mountains
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Triassic dol; mit8s .;;,d. evaporites
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cryStalline/metamorphic basement -
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Sinemurian
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cold, normal salinity waters
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Pliensbachian
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but lack of subsidence suggests
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a horizontal detachment surface
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fault geometry is uncertain at depth,
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FORMATION OF SEAMOUNTS
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Abruzzi
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stratigraphy; Calcare Massiccio platform covers both the northern and central Apennines.
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Platform
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Sibillini Mountains are believed to have been derived from the Abruzzi platform (Castellarin et al., 1978).
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NO VERTICAL EXAGGERATION
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(Central Apennines)
NO VERTICAL EXAGGERATION
Abruzzi Platform
(b) Pliensbachian scenario;
connection between the Sibillini Mountains and the Abruzzi platform is uncertain, but detritus and megabreccias in the
Fig. 11. Schematic chronological evolution of the northern Apennines basin in the Jurassic. The precise palaeogeographic
deep interconnected basins. Seamounts begin stage of incipient drowning; limited production of ooids on seamount tops.
extension and relatively rapid normal faulting affects only the northern Apennines and forms small seamounts separated by
(a) Pre-faulting