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5 results for “Zechstein”
Supplementary material of Kristallbrockensalt microstructures of the Zechstein-2 rock salt from the Northern Netherlands
<p>This dataset represents supporting data for the paper entitled <strong>Grain size dependent large rheology contrasts of halite at low deviatoric stress: evidence from microstructural study of naturally deformed gneissic Zechstein-2 rock salt (Kristallbrockensalz) from the Northern Netherlands</strong> <strong>, </strong>which has been submitted to <strong>Solid Earth </strong>journal</p> <p>The so-called Kristallbrocken salt has a unique and quite spectacular grain size distribution and marks an important horizon throughout the entire Permian Basin. Based on microstructural observations we interpret that fine grained halite deformed much weaker (i.e. faster) and has characteristic pressure-solution structures, as compared to much less deformed Kristallbrocken megacrystals that developed subgrains during dislocation creep.</p> <p>This dataset contains (1) a collection of addiational micrographs from gamma irradiated halite thin sections, (2) high resolution sample overview scans in tramsmitted and reflected light microscopy and grain and subgrainsize measurements, (3) Supportind EBSD material, (4) BIB-SEM material and (5) XRD results of sedond phase inclusions.</p> <p>(1), (3) and (4) are compiled in PowerPoint (.pptx) format, (2) contains multiple files of microscopical images or panoramas overlain with interpreted digitized grain and subgrain boundaries compiled in Inkscape (.svg) files together with corresponding measurements in Excel (.xls) files and (5) a text document (.txt) of XRD second phase results.</p>
FIG. 1 in Anatomy and taphonomy of a coniferous wood from the Zechstein (Upper Permian) of NW-Hesse (Germany)
FIG. 1. — Map indicating the position of the locality Frankenberg-Geismar; A, schematic map of the geographic extent of the Zechstein Sea (in grey) in Western and Central Europe; B, map indicating the outcrops of Zechstein-sediments (grey) in NW-Hesse and the locality Frankenberg-Geismar ().
FIG. 4. — A-E in Anatomy and taphonomy of a coniferous wood from the Zechstein (Upper Permian) of NW-Hesse (Germany)
FIG. 4. — A-E,?Brachyoxylon sp. from the Zechstein (Upper Permian) of Frankenberg-Geismar (NW-Hesse); A, radial section, showing the central pith, flanked by cracks filled with sediment (Pb-WB-H-1/b); B, radial section, showing remains of a branch(?) (Pb-WB- H-1/b); C, detail of B, showing tracheids and rays adjacent to the branch(?) (Pb-WB-H-1/b); D, cross-section, showing cracks filled with sediment (Pb-WB-H-1/a); E, radial section, showing cracks filled with sediment (Pb-WB-H-1/b); F, G, charcoal from the Zechstein (Upper Permian) of Frankenberg-Geismar (NW-Hesse), exhibiting checked cell-walls, resulting from desiccation prior to charring. Scale bars: A, 500 µm; B, 1 mm; C, 100 µm; D, E, 1 mm; F, 90 µm; G, 30 µm.
FIG. 3 in Anatomy and taphonomy of a coniferous wood from the Zechstein (Upper Permian) of NW-Hesse (Germany)
FIG. 3. —?Brachyoxylon sp. from the Zechstein (Upper Permian) of Frankenberg-Geismar (NW-Hesse); A, cross-section, showing cracks filled with pyrite (Pb-WB-H-1/a); B, radial section, showing "spirally thickened" (probably checked during desiccation) tracheid walls (arrows) (Pb-WB-H-1/d); C, radial section, showing remains of a ray (arrow) with very poorly preserved cross-field pitting (Pb-WB-H-1/d); D, radial section, showing uniseriate, circular bordered pits (arrow) (Pb-WB-H-1/d). Scale bars: A, 1 mm; B, 150 µm; C, D, 100 µm.
FIG. 2 in Anatomy and taphonomy of a coniferous wood from the Zechstein (Upper Permian) of NW-Hesse (Germany)
FIG. 2. —?Brachyoxylon sp. from the Zechstein (Upper Permian) of Frankenberg-Geismar (NW-Hesse); A, complete specimen in tangential view; B, complete specimen in perpendicular view; C, radial section, showing pyritized and non-pyritized areas with anatomical preservation (Pb-WB-H-1/d); D, cross-section, showing pyritized and non-pyritized areas with anatomical preservation (Pb-WB-H-1/a); E, radial section, showing details of the central pith (Pb-WB-H-1/b). Scale bars: A, 3 cm; B, 2 cm; C, D, 1 mm; E, 200 µm.
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