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The Phuket Group in Peninsular Thailand and the Singha Formation in NW Malaysia are of Devonian to Lower Permian age. These approximately 3000 m thick strata, which are part of the »SE-Asian pebbly mudstone belt« stretching from Southern Tibet to Sumatra, have been interpreted as continental margin deposits (Mitchell et al. 1970). In contrast, recent papers …
2021-9-30 · The Early Palaeozoic Orogen is exposed from Wuyi to Yunkai in China and in the Song Chai massif of Vietnam (Fig. 1A). In the study area, South of Nanchang, we recognized five units (Fig. 1B). The Sedimentary Upper Unit consists, from top to bottom, of Middle to Late Ordovician turbidite with slumps, disrupted sandstone beds and pebbly mudstones.
2018-4-19 · The Rb-Sr and Sm-Nd isotopic analysis followed procedures similar to those described by Li et al. . Whole rock powders for Sr and Nd isotopic analyses were dissolved in Savillex Teflon screw top capsule after being spiked with the mixed 87 Rb-84 Sr and 149 Sm-150 Nd tracers prior to HF + HNO 3 + HClO 4 dissolution. Rb, Sr, Sm, and Nd were ...
2020-8-11 · Late Palaeozoic Borehole Section at Douglas River, Tasmania Triassic coal measures Siluro-Devonian Mathinna Beds Upper Marine Sequence (Three distinctive units as indicated) Lower Marine Sequence Lower Freshwater Sequence Sandy carbonaceous mudstone Pebbly quartz sandstone Black mudstone. richly fossiliferous (bryozoans. brachiopods)
A marine pebbly mudstone from the Swiss Alps: palaeotectonic implications and some consequences for the interpretation of Precambrian diamictites ... The …
2019-10-1 · The unit includes variously sized clasts and blocks of limestone, limestone breccia, basalt, chert, sandstone, siliceous mudstone, schist and granite within a mudstone matrix (Fig. 7; Isozaki, 1986). The mudstone matrix is usually not fissile and is less deformed than the matrix of older mélanges in the Chichibu Belt ( Fig. 8 ).
2006-11-11 · variegated mudstone with gypsiferous sandstone; basal gypsiferous pebbly sandstone 4: Ephedripites (D.), Pinaceae, Proteacidites, Normapollis a Compiled from Li and Qiu [1980], Li et al. [1981], Qinghai Bureau of Geology and Mineral Resources [1985, 1991], Qiu et al. [1981], Yu et al. [2001], and Zhai and Cai [1984] ; thickness is ...
2021-10-16 · The red mudstone forms a convenient marker and is conspicuous in the cliffs at Caerfai, at Castell on Ramsey Sound and at Cwm Mawr near Newgale. Pale tuffs interbedded with the red mudstone have given a radiometric age of …
The late Palaeozoic coal-bearing Madzaringwe Formation of the Karoo Supergroup in the Tshipise-Pafuri Basin in the Limpopo Province, South Africa, records part of the infill of a passive ...
2021-12-18 · Sea levels have been determined for most of the Paleozoic Era (542 to 251 million years ago), but an integrated history of sea levels has remained unrealized. We reconstructed a history of sea ...
Sm-Nd data for Ujaraaluk whole rocks scatter about a Sm/Nd vs. Nd-143/Nd-144 correlation (MSWD = 134) whose slope would correspond to 3.6 +/- 0.2 Ga if interpreted as an isochron.
2021-12-15 · THOMAS, L P. 1974. The Westphalian (Coal Measures) in south Wales. 133–160 in The Upper Palaeozoic and post-Palaeozoic rocks of Wales. OWEN, T R (editor). (Cardiff: University of Wales Press.) WARREN, P T, …
2018-12-24 · gray mudstone, argillaceous siltstone and thin layers of sandstone with wavy bedding and trace fossi(.˛ 3 and Supplementary Fig.˛)e middle part of the Tashkula Formation mainly occurs as normally graded pebbly sandstone to ˝ne sandstone, argillaceous siltstone or mudstone with scouring surface, hummocky-sunken cross
2018-6-28 · However, the nature and thickness of the pebbly mudstone units in East Sumatra remain uncertain, unlike the thick diamictite-bearing sequences in Irrawaddy (Ridd, 2016). Moreover, detrital zircons from northern Irrawaddy and …
2017-9-29 · ,,, 2018. 70-., 43 (1): 1-23. doi: 10.3799/dqkx.2018.001. Shen Qihan, Geng Yuansheng, Song Huixia, 2018. Progress on Metamorphic Petrology and Metamorphic Geology of China in the Last nearly 70 Years. Earth Science, 43 (1): 1-23. doi: 10.3799/dqkx ...
Biplab Bhattacharya: Sedimentary cycles related to the late Palaeozoic cold-warm climate change, 17 Talchir Formation, Talchir Basin, India Figure 5: Field photograph of the coarse-grained pebbly sandstone facies (Facies B), alternating with thin Figure 4: Field photograph of the Matrix-supported silty-mudstone layer (arrow), exposed along the ...
2017-12-14 · The conglomerate is characterized by disorganized pebbly sandstone, forming beds of 0.1 to 1 m thick (Fig. 4f). It is dark grey and consists of c. 40% clasts and 60% matrix. The clasts are well-rounded sandstone, mudstone, volcanic rocks and limestone in …
2020-4-27 · pebbly sandstone and gravelstone with subor-dinate mudstone. This part can be further sub-divided into three divisions. In its lower divi-sion, sandstone is dominant with subordinate gravelstone and bioturbated sandstone, repre-sented by facies Ss, Sf and Gs-2. The middle division is characterized byalternating ofsand-
2021-11-28 · JONES, D G. 1074. The Namurian series in south Wales. 117–132 in The Upper Palaeozoic and post-Palaeozoic rocks of Wales. OWEN, T R (editor). (Cardiff : University of Wales Press.) KELLING, G. 1974. Upper Carboniferous sedimentation in South Wales. 185–224 in The Upper Palaeozoic and post-Palaeozoic rocks of Wales. OWEN, T R (editor).
Depleted mantle model ages for the volcanic rocks range from T DM (Nd) = 670 Ma to 1000 Ma and T DM (Hf) = 840 to 1030 Ma. The model ages for the intrusive rocks range from T DM (Nd) = 1220–1450 Ma and T DM (Hf) = 1150–1620 Ma. Rocks with strongly negative ε Ndt and ε Hft compositions also have low Nb/Th ratios (Figs. 13A and 13B).
2019-7-31 · the Late Palaeozoic Coal-Bearing Madzaringwe Formation in the Tshipise-Pafuri Basin, South Africa ... Coarse to pebbly sandstone Channel lag deposits Fine-medium grained sandstone ... rounded mudstone and reddish to whitish, subrounded to
2021-10-22 · In the Thames estuary boreholes, the basal 2.5 m or so consist of glauconitic grey mudstone, gritty in places, with a pebbly and indurated basal bed, and black phosphatic nodules throughout. They are succeeded by about 6 m of medium to dark grey and fawn grey mudstone, which is burrowed and shelly in places and contains seams of phosphatic nodules.
1991. Alluvial fan, braided stream and possible marine shoreface deposits of the Lower Palaeozoic Erquy-Fréhel Group, northern Brittany. Proceedings of the Ussher Society, 7, 385-391.
2012-5-22 · The pebbly mudstone deposits of SE Asia form the western margin of the Palaeozoic outcrops from southern Tibet to Sumatra. To my knowledge, the only sufficiently investigated outcrops are those of peninsular Thailand and western Malaysia. Due to the political realities and outcrop conditions, we ...
2019-11-18 · ,,,。. 2007 (2009),。. 1914 ...
Facies D :DBlack mudstone facies A thin band (9 m thick) of darker coloured massive mudstone is present in the middle of Unit 3. The mudstone Figure l. Locality map of major outcrops of the mid-palaeozoic red beds of Unit 3, Jentik Formation in northwest Peninsular Malaysia. 1, Kampung Guar Jentik, Beseri district, Periis;2, Hutan Aji, perlis; 3.
The Karoo Supergroup in the Ellisras basin consists of sediments that were deposited predominantly during the Permian Period. Mudstone samples of the Swartrant and Grootegeluk Formations of the Ecca Group and the succeeding Eendragtpan Formation of the Beaufort Group were collected from borehole core. Based on the concentration and ratios of relatively …
2021-12-15 · The Manx Group is dominated by laminated mudstone and siltstone but in some parts of the sequence it is composed largely of thinly bedded, fine-grained sandstone; the depositional style is turbiditic (Plate P018619). Large-scale slumped deposits of pebbly mudstone occur in parts of the succession and rare volcanic rocks appear in one or two places.
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