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124 results for “crust”
FIG. 12 in The Sarmatian (middle Miocene) "petrified forest" of Gramada (NW Bulgaria): role of the calcareous crusts
FIG. 12. — GR4 internal part microfacies; A, overview showing the porosity determined by the voids, partially filled by peloidal accumulations between the micritic columns; B, detail of peloids showing features of faecal pellets; C, cellular structures (type 5); D, E, spaces between columns filled by peloidal accumulations; F, G, micritic clusters containing intertwined filaments (type 4); H, composite crust with elongated filamentous and cellular structures. Scale bars: A, 5 mm; B-D, 500 µm; E, H, 200 µm; F, G, 100 µm.
FIG. 10. — A-G in The Sarmatian (middle Miocene) "petrified forest" of Gramada (NW Bulgaria): role of the calcareous crusts
FIG. 10. — A-G, GR1 Mactra limestone microfacies; A, overview showing horizontal deposit of disarticulated Mactra shells; B-D, Mactra valves within peloidal sediment; the structure of pellets recalls faecal pellets; E, porcelaneous nubecularid test; F, sediment with peloids and oolites showing variable nuclei; G, undetermined honeycomb bioclasts; H-L, GR2 microfacies; H, general view showing the succession of micritic crusts (cr) and peloid accumulations (pel); I, thin crusts (type 1) attributable to Corallinaceae; J, thin crusts (type 1) attributable to Corallinaceae; K, very micritized corallinaceous crust (type 2), revealing thin lines of cells; L, ostracod shells with finely oolitized outlines within the peloidal sediment. Scale bars: A, E-G, J, K, 200 µm; B, C, I, 500 µm; D, L, 100 µm; H, 5 mm.
FIG. 8. — A in The Sarmatian (middle Miocene) "petrified forest" of Gramada (NW Bulgaria): role of the calcareous crusts
FIG. 8. — A, Synthetic diagram of the constitution of the cylinders: 1, GR1, base with the Mactra limestone; 2, GR2, very compact micritic thin layer; 3, GR3, grooved limestone layer; 4, GR4, main mass made up of concentric layers; 5, GR5, dome-shaped top; 6, GR6, central cavity; B, C, details of the cylinders showing the elements 1 to 4; D, detail of the elements 2 to 4; E, detail of the element 3 showing the grooved external appearance; F, longitudinal section of a cylinder showing the concentric layers (4) around the central cavity (6); G, cross section of a cylinder showing the filled central cavity and the different concentric layers (4). Scale bars: B-E, 10 cm; F, G, the hammer gives the scale.
FIG. 7. — A-F in The Sarmatian (middle Miocene) "petrified forest" of Gramada (NW Bulgaria): role of the calcareous crusts
FIG. 7. — A-F, Different views of the cylinders showing the central cavity with usually smooth edges; G, H, detailed views showing the smooth internal structures. Scale bars: A-C, F, G, 10 cm; D, E, the hammer gives the scale.
FIG. 6. — A-I in The Sarmatian (middle Miocene) "petrified forest" of Gramada (NW Bulgaria): role of the calcareous crusts
FIG. 6. — A-I, Vertically arranged cylinders in natural position; F, preserved dome shaped in form of "hat"; note the position of the central cavity; Scale bars: A-C, E: 10 cm; D, F-I: the hammer gives the scale.
FIG. 3. — A in The Sarmatian (middle Miocene) "petrified forest" of Gramada (NW Bulgaria): role of the calcareous crusts
FIG. 3. — A, Satellite view of zone 1; the white dots represent the cylinders; B-E, Cylinders artificially displaced and horizontally arranged; F, G, Cylinders in vertical position, probably in their natural place. Scale bar: A, 50 m.
FIG. 4. — A in The Sarmatian (middle Miocene) "petrified forest" of Gramada (NW Bulgaria): role of the calcareous crusts
FIG. 4. — A, Satellite view of zone 2; the white dots represents the cylinders (the white arrows indicate the place of some cylinders); B-D, Cylinders in natural vertical position; B, Example of cylinder exhibiting a preserved dome shaped in form of "hat"; E, View of the outcrop under the zone 2 (Z2) with horizontal limestone beds indicated by the white arrow; F, Detail of the outcrops directly below the cylinder zone; it displays the oolitic limestone (ool) topped with Mactra limestone (mac); G, Detail of the limestone with accumulations of Mactra. Scale bar: A, 50 m; F, G, the hammer (length: 28 cm) gives the scale.
FIG. 2. — A in The Sarmatian (middle Miocene) "petrified forest" of Gramada (NW Bulgaria): role of the calcareous crusts
FIG. 2. — A, Geological map of the studied area; B, Satellite view of the outcrops to the north of the locality of Gramada and location of the two main zones exhibiting the calcareous cylinders.
FIG. 1. — A in The Sarmatian (middle Miocene) "petrified forest" of Gramada (NW Bulgaria): role of the calcareous crusts
FIG. 1. — A, Geographical location of the study area in Bulgaria;B, Studied area in the Vidin district.
Fig. 9 Microbial crusts and sponges. a in Upper Jurassic To Lowermost Cretaceous Microfossils From The Hăghimaş Mountains (Eastern Carpathians, Romania)
Fig. 9 Microbial crusts and sponges. a Laminated, fine-peloidal stromatolitic structure; thin section FO1-F2(2). b Lithistid(?) sponge; thin section FO2-B6(2). c-e Microbial crust around a sediment fragment containing different bioclasts showing encrusting Koskinobulina socialis Cherchi & Schroeder (white arrows in d and e = close-up views of c). The arrow in c points to a saccdocomid ossicle); thin section F1-G. f Rivularia/Cayeuxia type cyanobacteria; thin section FO1-10B. g Calpionella alpina Lorenz; thin section FO4. h Microbial-ferruginous crust; thin section FO2-A1. i Muranella parvissima (Dragastan); thin section FO1-H(2).
Supplementary material to: "Formation of low-pressure reaction textures during near-isothermal exhumation of hot orogenic crust (Bohemian Massif, Austria)"
<p>Supplemantary material to "Sorger, D., Hauzenberger, C. A., Finger, F., Linner, M., Skrzypek, E., & Schorn, S. (2024). Formation of low-pressure reaction textures during near-isothermal exhumation of hot orogenic crust (Bohemian Massif, Austria). Journal of Metamorphic Geology, 42(1), 3–34."</p>
Rapid Impact Crater Relaxation Caused by An Insulating Methane Clathrate Crust on Titan: Data and Marc Files
<p><span>Data files for several figures in the manuscript "Rapid Impact Crater Relaxation Caused by An Insulating Methane Clathrate Crust on Titan" Published in The Planetary Science Journal. This includes data for the following figures: 4, 6, 7, 8 and 10. Two example Hexagon Marc-Mentat mud files for the axisymmetric thermal simulation and mechanical simulation of a 10 km thick clathrate, 85 km diameter crater are also included.</span></p> <p><span>Each column is self-explanatory except for the two relative depth data files. "Relative_Depth_Deep_Fig8" includes the results for simulations that use the initially deeper crater depth, and "Relative_Depth_Shallow_Fig8" includes the results for simulations that use the initially shallower crater depth. The columns are labeled with a shorthand notation for pairs of columns that represent the relative crater depth at specified times in the simulation. An example of time is “t(yr)_v21_120_5” and the corresponding relative depth column is “v21_Rd_120_5.” Time is given in years and relative depth is unitless. These specific examples provide results for a simulation that has a viscosity cutoff of 10^21 Pa s and a 120 km diameter crater with a 5 km thick methane clathrate crust overlying water ice.</span></p>
Seismic Model of the Seafloor Sediment and Shallow Oceanic Crust of the Alaska-Aleutian Subduction Zone at the Alaska Peninsula
<p>This dataset is supplementary to</p> <blockquote> <p>Zheng, Mengjie, Sheehan, Anne, Liu, Chuanming, Wu, Mengyu, & Ritzwoller, Michael. (2024). Characterizing Sub-Seafloor Seismic Structure of the Alaska Peninsula Along the Alaska-Aleutian Subduction Zone. <em>Journal of Geophysical Research: Solid Earth</em>, <em>129</em>(11), e2024JB029862. <a href="https://doi.org/10.1029/2024JB029862">https://doi.org/10.1029/2024JB029862</a></p> </blockquote> <p>This dataset contains files of sub-seafloor S-wave velocities and sediment properties.</p>
Supplemental datafiles for the manuscript "On the origin of seismic anisotropy in the shallow crust of the Northern Volcanic Zone, Iceland"
<p>Files to accompany the submission of the manuscript <strong>"On the origin of seismic anisotropy in the shallow crust of the Northern Volcanic Zone, Iceland" </strong>to the Journal of Geophysical Research: Solid Earth.<br> <br> <strong>File 1: </strong>conorbacon_ds01.inp - Input file for Coulomb</p> <p><strong>File 2: </strong>conorbacon_ds02.txt - Shear-wave splitting results file</p> <p> </p>
Text-fig. 1. Megastriae and post mortem epicoles on Tragoceras falcatum (SCHLOTHEIM, 1820). Arrows and M1–M3 indicate megastriae, bryozoan colonies are indicated by B1 and B2. a: GIT 819-1, left lateral view; b: body chamber of GIT 819-1, dorsal view; c: body chamber of GIT 819-1, left lateral view; d: GIT 819-1, right lateral view; e: PIMUZ 37299, right lateral view; f: detail of the body chamber of GIT 819-1, right lateral view, encrusted by bryozoans; g: bryozoan colony with Trypanites borings growing on an older bryozoan crust GIT 819-1. Specimens oriented with aperture downwards. Scale bars 10 mm. in Conch Structures, Soft-Tissue Imprints And Taphonomy Of The Middle Ordovician Cephalopod Tragoceras Falcatum From Estonia
Text-fig. 1. Megastriae and post mortem epicoles on Tragoceras falcatum (SCHLOTHEIM, 1820). Arrows and M1–M3 indicate megastriae, bryozoan colonies are indicated by B1 and B2. a: GIT 819-1, left lateral view; b: body chamber of GIT 819-1, dorsal view; c: body chamber of GIT 819-1, left lateral view; d: GIT 819-1, right lateral view; e: PIMUZ 37299, right lateral view; f: detail of the body chamber of GIT 819-1, right lateral view, encrusted by bryozoans; g: bryozoan colony with Trypanites borings growing on an older bryozoan crust GIT 819-1. Specimens oriented with aperture downwards. Scale bars 10 mm.
Datasets for the paper: "Rock-matrix porosity and permeability of the hydrothermally altered, upper oceanic crust, Oman ophiolite"
<p>This dataset includes all the data used for the paper submitted to the Journal of Geophysical Research: Solid Earth, entitled: <strong>Rock-matrix porosity and permeability in the hydrothermally altered, upper oceanic crust, Oman ophiolite. </strong></p> <p>One excel file is provided with the following tables on separate sheets:</p> <p>Table 1: Sample locations, alteration types, and petrophysical analyses</p> <p>Table S1: Trace element Zirconium and Yttrium analysis for this study’s sample set in Figure S1</p> <p>Table S2: Outcrop upscale results from image analysis</p> <p>Table S3: Sample bulk rock geochemistry</p>
Supplementary Videos for "The Stability of Dense Oceanic Crust Near the Core-Mantle Boundary"
<p>Supplementary video files for manuscript "The Stability of Dense Oceanic Crust Near the Core-Mantle Boundary". </p> <p>Contains movies for simulations, B0.00, B0.22, B0.33, B0.44, B0.55, B0.66, B0.77, B0.88 showing the temporal evolution of the temperature anomaly and bulk composition fields for a view of the 3D mantle domain with a segment removed. </p>
Data and model from "An upper-crust lid over the Long Valley magma chamber" by Biondi et al., 2023
<p>Dataset and velocity model from the fiber-tomography study entitled "An upper-crust lid over the Long Valley magma chamber".</p> <p>The npz files within the PickedRepo.zip contain the following keys:</p> <ul> <li>ChannelID: ID of the channel (similar to station ID)</li> <li>ChannelPos: Lat/Lon/Elevation of each channel</li> <li>P_TT: Pick P-wave traveltime for each channel</li> <li>P_W: P-wave traveltime probability/confidence for each channel</li> <li>S_TT: Pick S-wave traveltime for each channel</li> <li>S_W: S-wave traveltime probability/confidence for each channel</li> </ul> <p>To read and plot the velocity models in the file <a href="https://zenodo.org/api/files/9a704e85-28de-495e-b09f-2578440aa304/FinalVpVsLongValleyDAS2023.npz">FinalVpVsLongValleyDAS2023.npz</a>, one can modify the basic script named ReadPlotVel.py</p>
Biotic and abiotic composition of biological soil crusts in grassland and tarbush ecosystems at the Jornada Basin LTER site, 2017-2018
This data package contains data on biotic and abiotic composition of biological soil crusts at grassland and shrubland sites at the Jornada Basin LTER site. Biological soil crusts (BSCs) of three types, cyanolichen, dark algal, and light algal, were collected during the summer 2017, fall 2017, and spring 2018 seasons to discern differences between two vegetation states (grass and tarbush). A total of 51 biocrusts were collected from 3 tarbush sites and 3 grass sites. Phospholipid fatty acid analysis was used to characterize the microfloral community, while a modified extraction method was employed to observe direct counts of microfauna (multicellular microbes and protists). Soil chemical analysis was also used to obtain nutrient concentrations of each biocrust. Data include microfauna counts, microflora biomass, and soil nutrient composition. This study is complete.
Small Mammal Exclosure Study (SMES) Cryptogamic Crust Data from Chihuahuan Desert Grassland and Shrubland at the Sevilleta National Wildlife Refuge, New Mexico (1995-2005)
The purpose of this study is to determine whether or not the activities of small mammals regulate plant community structure, plant species diversity, and spatial vegetation patterns in Chihuahuan Desert shrublands and grasslands. What role if any do indigenous small mammal consumers have in maintaining desertified landscapes in the Chihuahuan Desert? Additionally, how do the effects of small mammals interact with changing climate to affect vegetation patterns over time? This is data for soil surface cover of cryptobiotic (cryptogam) crusts measured on each of the SMES study plots. Cryptobiotic crusts were measured from each of the 36 one-meter2 quadrats twice each year when vegetation was measured. Cryptobiotic crusts include lichens, mosses, algae, brown algae, and cyanobacteria that form crusts on stable soil surfaces.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.