Dolomitization patterns in Jurassic-Cretaceous dissolution …
Along the Jurassic-Cretaceous dolomitic beds of the Tripolis Unit in the Mainalon Mt. and the surrounding areas, products of a widespread breccias have been recognized. This brecciation extended through at least two stages, early- and late diagenetic, respectively. The first brecciation stage is considered to have taken place …
Sedimentary structures and palaeocurrents of the Siwaliks …
In Primary Sedimentary Structures and Their Hydrodynamic Interpretation, Spec. Publs Soc. Econ. Paleont. Mineral. 12.Google Scholar. Sorby, H. C. 1856. On the physical geography of the Old Red Sandstone Sea of the Central District of Scotland. Edinb. New Phil. J. 3, 112 –22.
Foreland basins | Geophysical Journal International
Summary. The characteristic pattern of the subsidence, deformation, uplift and erosion of foreland basins, or exogeosynclines, has long been recognized by …
An overview of the maldivian coral reefs in Felidu and North …
This paper gives general information on: (1) sedimentary environments and carbonate producers in some Maldivian atolls (North Malé Atoll and Felidu Atoll); (2) theAcanthaster planci outbreaks in North Malé Atoll and (3) the geological evolution of the Maldives. (1) The distribution and the main features of the reefs are described. The rim of the atolls can be …
Markov chain analysis applied to an ancient alluvial plain …
Markov chain analysis is a comparatively simple statistical technique for the detection of repetitive processes in space or time. Coal measure cyclothems or fluvial fining-upward cycles are good examples of sedimentary successions laid down under the control of Markovian processes.
Dominant particle support mechanisms in debris
Within zones of little or no deformation by internal shearing in debris flows at Mt Thomas, about two-thirds of the weight of large particles is supported by buoyancy and about one-third by static grain to-grain contact.
Permian Brachiopods from Southern Thailand | Journal of …
The Rat Buri Limestone was sampled for silicified brachiopods at 7 localities along the southern peninsula of Thailand. From north to south these localities are: Ban Kao, Khao Phrik, Khao Tok Nam, Khao Chang, Phangnga, Ko Muk NE, and Ko Muk NW. This limestone forms steep monadnocks that project above the alluvium (or the sea at Muk …
Plug shaped burrows Conichnus
Plug-shaped ichnofossils Conichnus conicus, Conostichus broadheadi and C. stouti are found in the intercalated micritic sandstone and sandy allochemic limestone shale sequence of Bagh Group, Narmada district, Gujarat. These ichnospecies occur at two stratigraphic levels and shows distinct morphological features interpreted as …
Saddle dolomite: a new view of its nature and origin
Abstract. Saddle dolomite is a common product of late-stage diagenesis and hydrothermal activity. It has been suggested that during growth Ca enrichment occurs …
Stratal geometries, facies and sea‐floor erosion in Upper …
ABSTRACT Unusual lenticular stratal geometries and facies of the Upper Cretaceous Chalk of coastal Haute Normandie, France, are described and interpreted. Thirteen facies within these chalks are de...
The Treatise on Invertebrate Paleontology: a Manifesto
As the Treatise on Invertebrate Paleontology prepares for the coming century, the staff of the Paleontological Institute and the boards of advisors have begun the development of PaleoBank, an electronic, relational database that will facilitate the capture of up-to-date, paleontological information. Moving the Treatise project into the electronic …
LITHOGENESIS AND GEOTECTONICS: THE SIGNIFICANCE OF …
lithogenesis and geotectonics: the significance of compositional variation in flysch arenites (graywackes). author crook kaw aust. natl. univ., canberra source soc ...
Nature, origin and classification of peritidal tepee structures …
Distinctive peritidal tepee antiform structures, buckled margins of saucer-like megapolygons are common in marine vadose fenestral and pisolitic limestones and/or dolomites of carbonate platform sequences and occur in intertidal and supratidal carbonates ranging in age from Silurian to Holocene.
Publications from 1917 | Jackson School Museum of Earth …
Contributions to the knowledge of *Richthofenia* in the Permian of West Texas. University of Texas Bulletin 55: 3-55, 3 pl. Böse, E. 1917. The Permo-Carboniferous ammonoids of the Glass Mountains, West Texas and their stratigraphic significance. University of Texas Bulletin 1762: 3-241, 11 pl. Böse, E. 1919.
How Important Are Organic Acids in Generating Secondary …
Am Chem Soc Symp Ser 146, pp 169–189. CrossRef Google Scholar Lundegard PD, Land LS (1986) Carbon dioxide and organic acids: their role in porosity enhancement and cementation of the Texas Gulf Coast. In: Gautier DL (ed) Roles of organic matter in sediment diagenesis. Soc Econ Paleontol Mineral Spec Publ 38, pp 129–146.
Lower Ordovician sponge bioherms in the Makkol Formation …
Isolated sponge bioherms are documented from the Lower Ordovician Makkol Formation of the Taebaek Group in the Taebaeksan Basin, mideast Korea. They are formed by an association of a lithistid spongeArchaeoscyphia, a receptaculidCalathium and stromatolitic algae, and share many features with the Lower Ordovician buildups known elsewhere. …
Material Balance Considerations for the Generation of
Soc Econ Paleontol Mineral Spec Publ 26, Tulsa, OK, pp 175–207. Google Scholar Surdam RC, Crossey LJ (1985) Mechanism of organic/inorganic interactions in sandstone/shale sequences: relationship of organic matter and mineral diagenesis. In: Gautier DL, Kkaraka YK, Surdam RC (eds) Relationship of organic matter and mineral diagenesis.
Types of carbonate platforms: a genetic approach | Earthdoc
ABSTRACT Many types of carbonate platforms have been described, from homoclinal ramps to rimmed shelves and a full spectrum of variations in between; the distinction between these different types can be problematic. Nevertheless, classification of carbonate platforms is not just a semantic or academic issue. For example, it is clearly …
AAPG Datapages/Archives: Sediments of the Modern Niger …
Watermarked PDF Document: $14. Watermarked Document – A Watermarked Document is branded with the name of the original licensed customer to discourage unauthorized users from sharing the document outside the user's organization. The PDF is no longer restricted to one machine, but can be circulated to others in the same company or department.
Open-Ocean Phosphorites — In a Class by Themselves?
Abstract. Most phosphorites occurring on the crests of seamounts, ridges, and other elevated portions of the sea floor appear to be of marine origin, although at least some appear to have originated from the submergence of an insular-type phosphate deposit. The close relationship between iron-manganese crusts and "open-ocean" phosphorites ...
Sedimentary structures and palaeocurrents of the Siwaliks …
Summary. The present paper deals with sedimentary structures and palaeocurrents of the Siwaliks exposed between the Yamuna and Gola rivers, U.P., …
Revision of Albian Polyconitid and Monopleurid Rudist
Based on material collected in Lower Albian beds from Baja California, the revision of "Petalodontia" felixi and "Horiopleura" gregaria shows that the former must …
AAPG Datapages/Archives: Sediments of the Modern Niger …
Watermarked PDF Document: $14. Watermarked Document – A Watermarked Document is branded with the name of the original licensed customer to discourage unauthorized …
Firmgrounds – key surfaces in the recognition of parasequences in the
Aptian Lower Greensand Group exposures in the cliffs of the Isle of Wight (southern England) display a consistent coarsening-up cyclicity on the scale of centimetres to tens of metres that reflects the bed, bed-set, parasequence, parasequence set and sequence hierarchy.
Stable isotopes and predation marks shed new light on …
Ammonoids are extinct cephalopods with external shells which predominated in many late Paleozoic and Mesozoic marine ecosystems. Stable isotope data from ammonoid shells constitute primary tools ...
Saddle dolomite: a new view of its nature and origin
Saddle dolomite is a common product of late-stage diagenesis and hydrothermal activity. It has been suggested that during growth Ca enrichment occurs towards crystal edges leading to a lattice expansion relative to face centres. However, backscatter scanning electron microscopy of eight samples has revealed that, instead of …
Development of phosphatized hardgrounds in the miocene …
In the Maltese Islands two phosphorite layers occur in the Globigerina Limestone Formation (?Aquitanian to Langhian). These layers, labeled C1 and C2, display a multi-stage development with a two-stage hardground development on top (labelled lower and upper hardground).In the lower hardground, lithification and mineralization followed a …
Phanerozoic reef evolution: Basic questions and data base
An up-dated data base is a matter of importance and urgency in order for encouraging a process-oriented approach to the study of reef evolution.The evolution of reefs is a major section of a Priority Program of the Deutsche Forschungsgemeinschaft devoted to 'Global and regional controls of biogenic sedimentation'. Biological, paleontological and …