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-scale – as homogeneous, uniform units of the DAM throughout almost the entire research history of the massif. Recently, some studies (e.g., Batki et al., 2018 ; Heincz et al., 2018 ; Ódri et al., 2020 ) drew attention to distinct structural, textural and
a real challenge to determine their original volcanic facies. Primary textural features could have been overprinted or modified, making the genetic interpretation (e.g., pyroclastic rock or lava) of such rocks a difficult task for volcanologists (e
-feldspar melt veins (10–20 μm thick, linked to melt pockets, branching to two parts, around two veins/500 μm) with schlieren structure. Fig. 1 Examples of the textural description from BSE images: review of the shock
The Mócs chondrite was studied by optical microscopy, element mapping, as well as scanning electron microscope backscattered electron (SEM—BSE) imaging, in order to gain a better understanding of the thermal metamorphic as well as post-shock annealing evolution and the mineralogical signatures in this meteorite. The studied thin section of Mócs meteorite contains 26 chondrules with a variety of chondrule textures, which are characterized by a blurry rim. The chondrules mostly consist of pyroxene and olivine, whereas feldspars occur only in the recrystallized groundmass, chondrule mesostasis, and mineral melt inside and beyond the shock veins. It was found that the matrix was completely recrystallized. According to the scanning electron microscope and optical microscope observations mentioned above, it can be concluded that the Mócs chondrite is a 6.5 petrographic type.
) Busby-Spera , C.J. , J.D.L. White 1987 : Variationin peperite texture associated with differing hostsediment properities . – Bulletin of Volcanology , 49 , pp. 765 – 775
garnet grains; (d) pseudomorphic kyanite aggregate after garnet; (e) kyanite aggregates align parallel to the S2 foliation plane; (f) feldspar σ-clast; (g) feldspar σ-clast associated quartz aggregates with polygonal microtexture; (h) boudinage textured
abundant rock type has a strongly oriented porphyritic texture with grey or pale green, microcrystalline matrix composed of quartz, sericite, and feldspars. The fabric is dominated by anastomosing cleavage domains consisting of phyllosilicates enveloping
hornfels Aurora-valley, gallery VII. K/Ar whole rock 172 Phlogopite marble Lazarea, borehole, 141, m 137 K/Ar biotite 150.0 ± 6.0 Pál-Molnár and Árva-Sós (1995) Hornblendite with textural ordering Jolotca, Tarniţa de Sus creek K/Ar amphibole 237.4 ± 9
flows The samples from lava rocks are of andesitic composition with microholocrystalline texture. The larger plagioclases are 1 mm long, hypidiomorphic, and with well-defined or blurred (no. 1 Nagy-Hideg Hill) edges. Some show oscillatory
the scanning of multiple pebbles simultaneously. If the scanner is connected to an iPad, it can record the texture of the surface, e.g., an ID written on the sample. This way, the digitalized pebbles can be easily distinguished from each other
