High frequency glacio-eustatic sealevel oscillations with Milankovitch characteristics recorded in Middle Triassic platform carbonates in northern Italy

Goldhammer, Robert K.; Dunn, P.; Hardie, Lawrence A.

doi:10.2475/ajs.287.9.853

Cited by 269 publications

(172 citation statements)

References 0 publications

Supporting

Mentioning

166

Contrasting

Unclassified

Order By: Relevance

“…600 m-thick succession of wellbedded sedimentary cycles, mostly capped by subaerial exposure surfaces, with abundant oncoids and dasycladacean algae (Egenhoff et al, 1999;Goldhammer et al, 1987;Preto et al, 2001;Figures 7b, 7c). Fine subdivisions of the platform interior succession were established by Goldhammer et al (1987), and then completed and refined by Egenhoff et al (1999). The succession is subdivided into six lithozones that are distinguished on the base of relative abundance of subaerial exposure surfaces and tepee structures.…”

Section: Units Of the Latemar Platform 421 Inner Platform Unitsmentioning

confidence: 99%

See 1 more Smart Citation

Geological map of the Middle Triassic Latemar platform (Western Dolomites, Northern Italy)

et al. 2013

View full text Add to dashboard Cite

The Latemar is a Middle Triassic isolated carbonate buildup with a diameter of approximately 3 km, that crops out in the western Dolomites, northern Italy. The platform is an important case study and potential analogue for carbonate hydrocarbon reservoirs. Detailed field mapping of the platform has been carried out on a high-resolution topographic base extracted from airborne LIDAR to produce a geological map at 1:5000 scale. Remote sensing was used for the recognition of structural features and then validated in the field. In addition, high-resolution digital photographs were used to interpret the geology of inaccessible rock walls. This work represents a up-to-date detailed geologic map of the Middle Triassic Latemar platform that enhances its internal units subdivision and highlights its complex shape, characterized by gulfs and internal basins and strongly controlled by synsedimentary tectonics.

show abstract

Section: Units Of the Latemar Platform 421 Inner Platform Unitsmentioning

confidence: 99%

“…Exceptional outcrop conditions (Figure 1) made the Latemar the object of several detailed sedimentological and stratigraphical studies (Egenhoff et al, 1999;Gaetani et al, 1981;Goldhammer et al, 1987;Marangon et al, 2011;Preto et al, 2001;Zühlke et al, 2003, among others).…”

Section: Introductionmentioning

confidence: 99%

Geological map of the Middle Triassic Latemar platform (Western Dolomites, Northern Italy)

et al. 2013

View full text Add to dashboard Cite

show abstract

“…These rock units can be divided up into three depositional sequences based on identification of major flooding surfaces and facies stacking patterns. The average time of deposition for each of the sequences is thus about 10-15 million years, indicating that they are third order or high frequency second order sequences (Vail et al, 1977;Goldhammer et al, 1987). These sequences can be correlated from the subsurface northwest of Prudhoe Bay to the northeastern and central Brooks Range (fig.…”

Section: Sequence Stratigraphy Biostratigraphy and Sea Level Historymentioning

confidence: 99%

Sequence stratigraphy and geochemistry of the upper Lower through Upper Triassic of Northern Alaska: Implications for paleoredox history, source rock accumulation, and paleoceanography

Kelly¹,

Whalen²,

McRoberts³

et al. 2007

View full text Add to dashboard Cite

“…Goldhammer et al (1987) proposed that the cyclic succession of over 500 depositional cycles (<1 m average thickness) on the Latemar Platform (the Dolomites, northern Italy) is a sedimentary record of composite glacio-eustasy, driven by Milankovitch orbital forcing. This interpretation was based on several lines of evidence, including (a) the shallowingupward facies succession within each cycle (thicker subtidal unit overlain abruptly by a thin centimetre-scale, subaerial cap); (b) a prevalent 5:1 bundling of the 'fundamental' metrescale cycles into lower-frequency 'megacycles'; (c) time-series analysis of the cyclic succession showing agreement with predicted Triassic astronomical frequencies (Goldhammer et al, 1987(Goldhammer et al, , 1990Goldhammer & Harris, 1989;Hinnov & Goldhammer, 1991;Hinnov et al, 1997;Preto et al, 2001Preto et al, , 2004.…”

mentioning

confidence: 99%

The Allocyclic Interpretation of the ‘Latemar Cycles’ (Middle Triassic, the Dolomites, Italy) and Implications for High‐Frequency Cyclostratigraphic Forcing

Forkner

Hinnov

Goldhammer

et al. 2009

Perspectives in Carbonate Geology

View full text Add to dashboard Cite

The Middle Triassic Latemar Platform is an approximately 5 km wide, 700 m thick isolated carbonate platform succession containing over 500 cycles (<1 m average thickness), which have been attributed to allocyclic forcing by Milankovitch to subMilankovitch cycle driven composite eustasy. These interpretations are based on the facies composition of the cycles (thicker subtidal units overlain abruptly by thin, centimetre-scale, subaerial caps), the 5:1 bundling of the 'fundamental' metre-scale cycles into lower-frequency 'megacycles', and spectral analyses of thickness and rank series showing conspicuous matches to predicted Milankovitch periodicities. The infl uence of periodic Milankovitch cycle-driven composite eustasy on the development of the Latemar cyclic succession has been questioned based on the dating of ashfall tuffs, palaeomagnetic analysis of the platform, and correlation to biostratigraphic markers in nearby basinal deposits. In order to test the interpretation of allocyclic forcing for Latemar cycles, the cyclic succession preserved at Mendola Pass (located 30 km northwest of Latemar Platform) was investigated where Latemar-equivalent cyclic platform interior strata are well exposed. The Mendola cycles (average 0.70 m per cycle) are also bundled into upward-thinning packages with an approximate 5:1 ratio. However, unlike the subtidal deposits immediately overlain by vadose diagenetic caps found in the Latemar succession, Mendola cycles consist of a mud-rich subtidal unit gradationally overlain by a cryptomicrobial (peritidal) laminite cap. A measured section from Mendola Pass of 36 cycles correlates biostratigraphically and statistically to a unique interval within the Latemar succession. Although laminite-capped cycles are often attributed to autocyclicity, the similarity of the stacking patterns of the Mendola cycles to those of Latemar support an allocyclic interpretation. In addition, depositional rates calculated from dated Holocene shallow-water carbonate facies equivalent to those at Latemar and Mendola Pass are shown to be consistent with Milankovitch or multimillennial periodicities, rather than millennial (1 kyr) cycle periods. Finally, the question of whether comparative sedimentology can be relied upon for the interpretation of relative cycle duration is considered, or if comparative sedimentology has reached its useful limit for identifying facies and depositional environments with respect to the Middle Triassic. It is concluded that statistical and biostratigraphic correlations, in addition to comparative sedimentology, indicate that the Latemar and Mendola cycles were deposited under the control of an allogenic forcing mechanism, and that this mechanism generated depositional cycles with multimillennial individual periodicities.

show abstract

High frequency glacio-eustatic sealevel oscillations with Milankovitch characteristics recorded in Middle Triassic platform carbonates in northern Italy

Cited by 269 publications

References 0 publications

Geological map of the Middle Triassic Latemar platform (Western Dolomites, Northern Italy)

Geological map of the Middle Triassic Latemar platform (Western Dolomites, Northern Italy)

Sequence stratigraphy and geochemistry of the upper Lower through Upper Triassic of Northern Alaska: Implications for paleoredox history, source rock accumulation, and paleoceanography

The Allocyclic Interpretation of the ‘Latemar Cycles’ (Middle Triassic, the Dolomites, Italy) and Implications for High‐Frequency Cyclostratigraphic Forcing

Contact Info

Product

Resources

About