RT Book, Section
T1 Ammonite Taphocycles in Carbonate Epicontinental Platforms
A1 Fernández López, Sixto Rafael
A2 Hall, R.L.
A2 Smith, P.L.
AB Variations of preservational features of the successive recorded associations ofammonites in carbonate epicontinental platforms enable distinction of taphonomic cycles inducedby relative sea-level changes. A taphocycle comprises two or more successive recorded-associationsshowing cyclical variations in their taphonomic characters, resulting from an environmental cycle.Shallowing-upwards sequences in carbonate outer platforms, and positive taphosequences, wereformed during phases of increasing water turbulence and decreasing rate of sedimentation. Positiveand negative taphosequences, (or taphosequences of increasing and decreasing turbulence), enableidentification of shallowing-upwards sequences and infilling sequences of fifth-order respectively.Condensed sections show different characters in shallow and proximal environments in relation todeep and distal environments of the carbonate epicontinental platforms. The degree of taphonomiccondensation in preserved ammonite associations reaches the highest values in shallow andproximal environments of the platform, not in deep and distal environments, though the degree oftaphonomic heritage (i.e., the ratio of reelaborated (reworked) elements to total recorded elements)can, in both cases, reach 100%. These taphonomic data are of stratigraphic interest since theyprovide an independent test of the cycles distinguished in sequence stratigraphy.
PB Trans Tech Publications
SN 0878498443
YR 1998
FD 1998
LK https://hdl.handle.net/20.500.14352/60731
UL https://hdl.handle.net/20.500.14352/60731
LA eng
DS Docta Complutense
RD 19 abr 2025