THE END CRYOGENIAN AND EARLY EDIACARAN BOUNDARY AND THE ONSET OF PHOSPHOGENESIS IN A TRANSITIONAL SEDIMENTARY SUCCESSION: JACADIGO AND CORUMBA GROUPS, SOUTHWESTERN BRAZIL

2016 ◽  
Author(s):  
Eric E. Hiatt ◽  
◽  
Leandro G. Silva ◽  
Peir K. Pufahl
Keyword(s):  
Sedimentary Succession

scholarly journals Environmental evolution, faunal and human occupation since 2 Ma in the Anagni basin, central Italy

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Fabio Florindo ◽  
Fabrizio Marra ◽  
Diego E. Angelucci ◽  
Italo Biddittu ◽  
Luciano Bruni ◽  
...  
Keyword(s):  
Central Italy ◽  
Time Frame ◽  
Archaeological Sites ◽  
Time Interval ◽  
Human Occupation ◽  
Environmental Evolution ◽  
Entire Interval ◽  
Field Surveys ◽  
Sedimentary Succession ◽  
Favorable Conditions

AbstractWe present the study of a composite, yet continuous sedimentary succession covering the time interval spanning 2.6–0.36 Ma in the intramontane basin of Anagni (central Italy) through a dedicated borecore, field surveys, and the review of previous data at the three palaeontological and archaeological sites of Colle Marino, Coste San Giacomo and Fontana Ranuccio. By combining the magneto- and chronostratigraphic data with sedimentologic and biostratigraphic analysis, we describe the palaeogeographic and tectonic evolution of this region during this entire interval. In this time frame, starting from 0.8 Ma, the progressive shallowing and temporary emersion of the large lacustrine basins and alluvial plains created favorable conditions for early hominin occupation of the area, as attested by abundant tool industry occurrences and fossils. This study provides new constraints to better interpret the hominin migratory dynamics and the factors that influenced the location and spatial distribution during the early occupation of this region.

The sedimentary succession of the last ~ 3.50 Myr in the western South Yellow Sea: Paleoenvironmental and tectonic implications

2018 ◽  
Vol 399 ◽  
pp. 47-65 ◽  
Author(s):  
Jian Liu ◽  
Xunhua Zhang ◽  
Xi Mei ◽  
Quanhong Zhao ◽  
Xingwei Guo ◽  
...  
Keyword(s):  
Yellow Sea ◽  
South Yellow Sea ◽  
Tectonic Implications ◽  
Sedimentary Succession

scholarly journals Depositional Architecture and Facies of a Complete Reef Complex Succession: A Case Study of the Permian Jiantianba Reefs, Western Hubei, South China

Minerals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 533
Author(s):  
Beichen Chen ◽  
Xinong Xie ◽  
Ihsan Al-Aasm ◽  
Wu Feng ◽  
Mo Zhou
Keyword(s):  
Upper Permian ◽  
Field Observations ◽  
Comprehensive Description ◽  
Reef Facies ◽  
Reef Complex ◽  
Sedimentary Succession ◽  
Western Hubei ◽  
Depositional Architecture ◽  
Marginal Reef

The Upper Permian Changhsingian Jiantissanba reef complex is a well-known platform marginal reef, located in the western Hubei Province, China. Based on field observations and lithological analysis of the entire exposed reef complex, 12 reef facies have been distinguished according to their sedimentary components and growth fabrics. Each of the lithofacies is associated with a specific marine environment. Vertically traceable stratal patterns reveal 4 types of the lithologic associations of the Jiantianba reef: (1) heterozoan reef core association: developed in the deep marginal platform with muddy composition; (2) photozoan reef core association developed within the photic zone; (3) tide-controlled reef crest association with tidal-dominated characteristic of lithofacies in the shallow water; and (4) reef-bank association dominated by bioclastic components. The entire reef complex shows a complete reef succession revealing a function of the wave-resistant and morphological units. This study displays a complete sedimentary succession of Jiantianba reef, which provides a more accurate and comprehensive description of the reef lithofacies and a better understanding of the structure and composition of organic reefs.

scholarly journals The Viséan sedimentary succession at the Gara el Itima (Anti-Atlas, Morocco) and its ammonoid faunas

Fossil Record ◽  
2006 ◽  
Vol 9 (1) ◽  
pp. 3-60 ◽  
Author(s):  
C. Klug ◽  
S. Döring ◽  
D. Korn ◽  
V. Ebbighausen
Keyword(s):  
New Species ◽  
Sea Level ◽  
Sea Level Fluctuations ◽  
Sedimentary Succession ◽  
Mixed Carbonate

Abstract. A late Viséan section of clastic and carbonatic rocks is described from the eastern part of the Anti-Atlas (Morocco). The sedimentary succession is a mixed carbonate-siliciclastic system influenced by sea-level fluctuations. The sedimentology of the section is interpreted with respect to transgressive-regressive cycles and systems tracts. Highstand sediments yielded ammonoid assemblages from six horizons; a total of 1,040 specimens separated into 20 species are described in the palaeontological section. The genus Itimaites is new, together with the 16 new species Itimaites parabolicus n. sp., Calygirtyoceras zrigatense n. sp., Sudeticeras fornicum n. sp., Sudeticeras pusillobatum n. sp., Sudeticeras occultornatum n. sp., Goniatites rodioni n. sp., Goniatites gerberi n. sp., Goniatites evelinae n. sp., Hypergoniatites fusiger n. sp., Neogoniatites worki n. sp., Dombarites bellornatus n. sp., Platygoniatites rhanemensis n. sp., Ferganoceras torridum n. sp., Prolecanites meandricus n. sp., Prolecanites mapesi n. sp., Epicanites hamianensis n. sp., and Megapronorites itimensis n. sp. Ein aus Klastika und Karbonaten aufgebautes Obervisé-Profil wird vom östlichen Bereich des Anti-Atlas (Marokko) beschrieben. Bei der Sedimentabfolge handelt es sich um ein gemischtes Ablagerungssystem aus Karbonaten und Siliziklastika, das durch Meeresspiegelschwankungen gesteuert wurde. Die Sedimentologie des Profiles wurde hinsichtlich Transgressions-Regressions Zyklen und System Trakten interpretiert. Hochstand-Sedimente lieferten Ammonoideen-Vergesellschaftungen aus sechs Horizonten; insgesamt wurden 1040 Exemplare gefunden, die 20 Arten zugeordnet wurden und im paläontologischen Teil beschrieben sind. Die Gattung Itimaites sowie die 16 Arten Itimaites parabolicus n. sp., Calygirtyoceras zrigatense n. sp., Sudeticeras fornicum n. sp., Sudeticeras pusillobatum n. sp., Sudeticeras occultornatum n. sp., Goniatites rodioni n. sp., Goniatites gerberi n. sp., Goniatites evelinae n. sp., Hypergoniatites fusiger n. sp., Neogoniatites worki n. sp., Dombarites bellornatus n. sp., Platygoniatites rhanemensis n. sp., Ferganoceras torridum n. sp., Prolecanites meandricus n. sp., Prolecanites mapesi n. sp., Epicanites hamianensis n. sp. und Megapronorites itimensis n. sp. sind neu. doi:10.1002/mmng.200600001

Contrasting fold styles in a volcano-sedimentary succession

1996 ◽  
Vol 33 (8) ◽  
pp. 1193-1200
Author(s):  
Pierre A. Cousineau ◽  
Robert Marquis
Keyword(s):  
Sedimentary Basin ◽  
Volcanic Rocks ◽  
Sedimentary Rocks ◽  
Structural Models ◽  
Sedimentary Basins ◽  
Basaltic Rocks ◽  
Field Evidence ◽  
Sedimentary Succession

Structural analyses of folded volcano-sedimentary basins rely heavily on the identification and use of way-up structures. These structures are more numerous and widespread in sedimentary rocks than in volcanic rocks. Structural models for such basins can therefore be biased by this fact. The Caldwell Group of the Quebec Appalachians is a folded volcano-sedimentary basin bounded bay major faults. It contains locally abundant basalt-rich bands. Near Lac-Etchemin, way-up in basalt flows is determined by pillow shelves that reflect paleohorizontal planes. The strike and dip of these shelf structures were measured and plotted on stereographic projections. Field evidence and the interpretation of stereographic projections indicate that the basalt-rich bands form open folds that plunge gently to the southwest. However, sandstone-rich bands form tight folds with undulating hinge lines (sheath-like). During initial folding, the basalt formed competent bands with limited aerial extent that were fractured by synthetic and antithetic faults rather than folded. The basalt slivers maintained a near-horizontal attitude while adjacent sedimentary rocks were folded and faulted. Further shortening tightened folds in the sediment-rich bands while producing open folds in slivers of basaltic rocks.

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