sedimentary facies news

Sedimentary records affected by bottom currents on polar margins, such as those of the Antarctic Peninsula, are essential to decipher the facies and facies …

The facies concept is fundamental to interpretation of sedimentary and metamorphic successions and processes and, therefore, to the interpretation of geological sequences from the results of direct and indirect investigation of the ground and interpolation between observation points in geological (and therefore engineering …

A facies (Latin for aspect or appearance) is a body of rock (i.e. a sequence of beds) or sediment marked by a particular combination of compositional, physical and …

The sedimentary iron-formations of Precambrian age in the Lake Superior region can be divided on the basis of the dominant original iron mineral into four principal facies: sulfide, carbonate, oxide, and silicate. As chemical sediments, these rocks reflect certain aspects of the chemistry of the depositional environments. The major control, at least for the sulfide, …

Open the PDF Link PDF for SEDIMENTARY FACIES AND ASSOCIATED DIASTROPHISM IN THE UPPER CRETACEOUS OF CENTRAL AND EASTERN UTAH in another window. Add to Citation Manager. OLIGOCENE FAUNAS, FACIES, AND FORMATIONS. Author(s) HORACE ELMER WOOD, 2ND. HORACE ELMER WOOD, 2ND

Abbreviation, age, and sedimentary environment for facies occurring in the study area, a tidal flat in the northern German Wadden Sea (adopted from Capperucci et al. (2022) 69).Positions of facies ...

Abstract We have developed a new machine-learning (ML) workflow that uses random forest (RF) regression to predict sedimentary-rock properties from stacked and migrated …

The present paper attempts to demonstrate the principle that problems of sedimentary facies are most logically approached along three interrelated but separate paths: lithology, biology, and tectonics. Synthesis of data from each of these lines of investigation leads to a more complete understanding of the events and paleogeographic conditions ...

Determination of lithofacies is one of the most important steps for reservoir characterization. Well log curves are not always sufficient to determine lithology as some times the signals are similar for different lithologies. We believe that the sequence of sedimentary patterns that follows the general geologic rules can be essential to help this disambiguation. This …

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The "sublacustrine fan" is a suborder facies of lake facies (2nd-order facies), i.e., a 3rd-order facies, and therefore the "subfacies" proposed by Zhao and Liu in Table 2 are 4th-order facies and their "microfacies" are 5th-order facies. The orders of the subfacies and microfacies proposed by Zhao and Liu are lower than those by Mineralogy …

Biogenic facies are accumulations of whole or fragmented shells and other hard parts of animals. Chemical facies result from precipitation of inorganic material from solution. The shapes and characteristics of facies may change as conditions change over time. sedimentary facies, Different, but contemporaneous and juxtaposed, sedimentary rocks.

Search metadata Search text contents Search TV news captions Search radio transcripts Search archived web sites Advanced Search. About; Blog; Projects; Help; Donate An illustration of a heart shape ... Sedimentary environments and facies. Publication date 1978 Topics Facies (Geology), Rocks, Sedimentary, Sedimentation …

The sedimentary facies concept was reviewed by Middleton (), Walker (), Reading (), Selley (1985; 2000), and many others.The most basic definition of a facies is a "body of rock with specified characteristics" (Reading 1986b, p. 4).Sedimentary facies are defined as areally restricted, three-dimensional bodies of rock or sediment that are …

This paper presents the facies and depositional environment of the early Miocene Dam Formation, Eastern Arabian platform, Saudi Arabia. Deposition of Dam Formation (Fm.) was considered as a restricted shallow marine deposition. Few studies suggest the role of sea-level change in its deposition but were without decisive …

The necessity for interdisciplinary studies is clearly expressed in this definition given by Amanz Gressly in 1838. In facies analysis paleontological, sedimentological, geological, and geochemical data provide the basic information about the sedimentary environment, the lithogenesis, and the biotopes of organisms preserved as fossils. Download ...

sedimentary facies, physical, chemical, and biological aspects of a sedimentary bed and the lateral change within sequences of beds of the same geologic age. Sedimentary …

The Permian Fengcheng Formation in the Mahu Sag was deposited in a volcanic-alkaline lacustrine evaporative environment and contains a unique variety of fine-grained sediments. This study examines, at a millimeter-scale, the influence of sedimentary microfacies on variability of lamina quality in fine-grained sediments in the second member of the …

My definition of facies is: (1) Sedimentary rocks are not facies. (2) Sedimentary environments are not facies. (3) The synthesis of sedimentary rocks and sedimentary environments is facies, and the term"facies " is a simpli-fied name of"sedimentary facies ". formed in sedimentary environments. (4) Sedimentary rocks.

Sedimentary rocks contain many characteristics at a variety of spatial scales, and basic observations at both the hand sample and outcrop level can aid in interpreting depositional environments. ... Together, these features are known as a facies, a body of rock (typically a sequence of several strata, or beds) that is distinct from adjacent ...

The objective of this paper is to describe the characteristics of the Changjiang delta sediments in detail, define the facies architecture, and determine progradation rates of the delta, based on sedimentary facies analysis and AMS 14 C dating of samples from three boreholes recovered from the central Changjiang delta plain …

Five sedimentary facies associations are identified; these are interpreted as the deposits of flood plain-dominated fine-grained meandering river (FA1), flood-dominated overbank environment (FA2), sandy meandering river (FA3), anastomosing river (FA4), and debris flow-dominated gravelly braided river (FA5). These changes in the fluvial system ...

Each depositional environment imparts distinctive signatures to the sediments, which is typical of the processes that were active during sedimentation. …

Coastal sedimentary processes. A complex array of processes influence coastal sedimentary facies ( Figure C29 ). Of these the most important are waves, tides, and biogenic processes. Sediment input is also critical to the facies character (grain size) and to the nature of the preserved deposit (sedimentation rate). Figure C29.

The Shunbei area, located in northern-central Tarim (Northwest China), represents a new, important area for petroleum and gas exploration. This study presents high-resolution, conodont biostratigraphically controlled stable carbon isotope data from 540 samples of four deeply buried (∼7000–8000 m) wells in the Shunbei area and its nearby …

Sedimentary Environments and Facies is one of the most distinguished and influential textbooks in the earth sciences published in the last twenty years. The two earlier editions won universal praise and became classic works in sedimentology Since the publication of the second edition, the study of sedimentary environments and facies has made great …

Using a seismic sedimentology theory, combining seismic facies results of each facies, sedimentary facies and evolution of each area are documented in turn establishing a sedimentary model by considering palaeo-geomorphology, sea level change and tectonic movement. The channel system and MTD (Mass Transport Deposition) system among …

It is characterized by common cyclic sedimentation in the facies sequence, reflecting a sedimentary environment and a specific geological age of the formation, …

14.2: The CTSFAF model. Page ID. One model for describing sedimentary facies in the lab or the field is the CTSFAF model. This model uses readily observable characteristics of the rocks and aids in the interpretation of depositional environments. The six aspects of CTSFAF are color/composition, texture, sedimentary structures, fossils ...

An integrated study of sediments was conducted to examine the facies architecture and depositional environment of the Cretaceous Pab Formation, Rakhi Gorge, and Suleiman Ranges, Pakistan. This research focused on analyzing architectural elements and facies, which are not commonly studied in sedimentary basins in Pakistan. To …

Significance of sedimentary facies. The result of sedimentary facies analysis is the recognition that they help control hydrocarbon accumulation. Sedimentary facies and other lithological characters play a major role in the process. This refers to reservoirs having high permeability and porosity favourable for hydrocarbon accumulation.

The lateral transition of sedimentary facies over time helps geologists build meaning from vertical outcroppings of sedimentary rock and reconstruct the regional and global geologic processes of Earth's past. It is through this process of observation and inference about geologic objects and process that time and space become integrated in …