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44 results for “karst formations”
Geoelectrical and hydro-chemical monitoring of karst formation at the laboratory scale
<p>We propose a dataset of two Estaillades limestone core samples subjected to acid percolation at two different rates.</p> <p>We monitored:</p> <ul> <li><strong>Permeability </strong>from high-frequency pressure gradient acquisition. Facing noise, we filtered this permeability with a Savitsky-Golay filter. Then, we resampled permeability values to compare them at specific times when we performed other measurements.</li> <li><strong>pH</strong> at the inlet and outlet.</li> <li><strong>Calcium </strong>concentration at the outlet.</li> <li><strong>Porosity</strong> was initially measured with petrophysical measurements and then calculated from calcium concentration during percolation experiments. We resampled the values to compare them at specific times when we performed other measurements.</li> <li><strong>Water electrical conductivity</strong> at the inlet and outlet.</li> <li><strong>Rock sample electrical conductivity</strong>, from which we calculated the formation factor. Rock sample electrical conductivity was high-frequency acquired. We thus resampled the values to compare them at specific times when we performed other measurements.</li> </ul> <p>We also present the pore size distribution of both samples before and after the percolation experiments. The distribution comes from the mean <strong>chord lengths distribution</strong> generated from tomography imaging.</p> <p>In addition to this dataset, we display a picture of the mesh of the sample and the electrodes generated with EIDORS software and with which we computed the geometric factor.</p>
Fig. 26 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 26. Species illustrated for comparative purposes: (A–C) Tropidophora moulinsii, holotype of Cyclostoma moulinsii Grateloup, 1840, 'Madagascar', max. diameter 33.1 mm, NHMUK 1907.11.22.12; (D–F) Tropidophora thesauri Fischer-Piette, 1949, Orangea, Diego Suarez [= Antsiranana] district, max. diameter 38.0 mm, NMSA L8438; (G–I) Tropidophora reticulata, one of three syntypes of Cyclostoma reticulatum (Adams & Reeve, 1850), 'Madagascar', max. diameter 15.1 mm, NHMUK 1874.12.11.231; (J–L) Kalidos hova, syntype of Nanina hova Odhner, 1919, Catsèpe, Madagascar, max. diameter 24.4 mm (SMNH).
Fig. 23 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 23. Kalidos maryannae sp. n.: (A–C) holotype, max. diameter 27.3 mm, height 17.7 mm, AMS C.474168; (D–J) paratypes, NMSA L8470/T2904: (D) specimen with bands of intermediate strength, max. diameter 29.3 mm; (E) specimen with broad brown bands and low spire, max. diameter 27.0 mm; (F) specimen spire of intermediate height, max. diameter 28.3 mm; (G, H) fresh subadult with unfaded colour pattern, max. diameter 24.8 mm; (I) large specimen with additional ⅛ whorl of growth, max. diameter 29.3 mm; (J) juvenile showing angular periphery, max. diameter 15.2 mm; (K) holotype, portion of last adult whorl showing sculpture of growth-lines and spiral threads.
Fig. 20 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 20. Ampelita namerokoensis Fischer-Piette, 1952, genitalia, NMSA L8442: (A) entire reproductive tract; (B) external view of penial complex; (C) penis opened longitudinally to show internal folds and raised papilla at insertion of epiphallus. Abbreviations: ag – albumen gland, bc – bursa copulatrix, bcd – bursa copulatrix duct, ep – epiphallus, ga – genital atrium, hd – hermaphrodite duct, od – oviduct, p – penis, pf – folds lining penis lumen, pp – penis papilla, pr – prostate, prm – penial retractor muscle, v – vagina, vd – vas deferens.
Fig. 18 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 18. Ampelita milloti Fischer-Piette, 1952, Tsingy Beanka, st'n 16/06, max. diameter 24.8 mm, NMSA L7127.
Fig. 17 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 17. Ampelita beanka sp. n., A. milloti Fischer-Piette, 1952 and A. namerokoensis Fischer-Piette, 1952, protoconch morphology and teleoconch microsculpture: (A, B) A. beanka, protoconch diameter 4.1 mm, st'n R04/09, respectively paratype, NMSA L8504/T2983, and holotype, AMS C.474166; (C, D) A. milloti, protoconch diameter 4.4 mm, both st'n 07/09, NMSA L8502; (E, F) A. namerokoensis, protoconch diameter 3.5 mm, respectively st'n 18/06, NMSA L8439, and st'n 03/06, NMSA L7038.
Fig. 15 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 15. Ampelita beanka sp. n.: (A–C) holotype, max. diameter 17.7 mm, height 8.0 mm, AMS C.474166; (D) specimen with less strongly shouldered whorls, max. diameter 19.1 mm, st'n 07/09, paratype, NMSA L8501/T2981; (E–F) specimens of the same size and collected from the same station R01/09, showing the differing extent to which the suture descends below the shoulder, max. diameter 17.1 mm, paratypes, NMSA L8507/T2982.
Fig. 14 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 14. Ampelita lindae sp. n.: (A–C) holotype, max. diameter 30.5 mm, height 12.6 mm, AMS C.474167; (D) holotype, microsculpture one quarter whorl prior to outer lip, scale bar = 2.5 mm; (E–G) paratype, max. diameter 29.0 mm, height 12.0 mm, NMSA L8468/T2903.
Fig. 13 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 13. Ampelita decaryi Fischer-Piette, 1952: (A–C) typical specimen, max. diameter 40.7 mm; (D–F) specimens showing variation in shell proportions and in relative width of supra-peripheral spiral bands [max. diameter: D, 39.4 mm; E, 38.0 mm; F, 40.9 mm]; (G) subfossil, max. diameter 43.0 mm. (A–F) Antsingimavo, st'n 04/06, NMSA L7090; (G) Kasijy Forest, Kelifely Plateau, st'n 08/05, NMSA L7010.
Fig. 22. Kalidos griffithshauchleri Emberton, 2002 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 22. Kalidos griffithshauchleri Emberton, 2002, genitalia, NMSA L7191: (A) lower portion of reproductive tract – gonad, albumen gland and bursa copulatrix missing; (B) upper part of penis, opened longitudinally to show well-developed penial verge extending from epiphallus. Abbreviations: bcd – bursa copulatrix duct, ep – epiphallus, f – flagellum, ga – genital atrium, p – penis, ps – penis sheath, pv – penial verge, prm – penial retractor muscle, sod – sperm-oviduct, v – vagina, vb – boss on penial verge, vc – cleft in penial verge, vd – vas deferens.
Fig. 11. Clavator griffithsjonesi Emberton, 1999 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 11. Clavator griffithsjonesi Emberton, 1999, genitalia, NMSA L7236: (A) entire reproductive tract (minus ovotestis); (B) penis opened longitudinally to show internal folds and pore at insertion of epiphallus. Abbreviations: ag – albumen gland, bc – bursa copulatrix, bcd – bursa copulatrix duct, ep – epiphallus, epp – epiphallus pore, f – flagellum, ga – genital atrium, hd – hermaphrodite duct, p – penis, pf – folds lining penis lumen, prm – penial retractor muscle, sod – spermoviduct, v – vagina, vd – vas deferens.
Fig. 25 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 25. Living animals from Tsingy Beanka: (A) Acroptychia bathiei Fischer-Piette & Bedoucha, 1965, st'n 13/06, shell diameter 23.2 mm, NMSA L7315; (B) Tropidophora humbug sp. n., st'n 12/06, shell diameter 28.3 mm, paratype, NMSA L7204/T2984; (C) Tropidophora secunda Fischer-Piette & Bedoucha, 1965, st'n 03/06, shell diameter approx. 19.0 mm; (D) Clavator griffithsjonesi Emberton, 1999, st'n 12/06, shell height 94.8 mm, NMSA L7192; (E) Ampelita milloti Fischer-Piette, 1952, st'n 07/09, shell diameter 19.2 mm, NMSA L8502; (F) Ampelita namerokoensis Fischer-Piette, 1952, st'n 12/06, shell diameter 20.3 mm, NMSA L8442; (G) Kalidos griffithshauchleri Emberton, 2002, st'n 12/06, shell diameter approx. 60 mm; (H) Kalidos maryannae sp. n., st'n 12/06, shell diameter 22.5 mm, paratype, NMSA L7193/T2944.
Fig. 9 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 9. Tropidophora sericea sp. n. and T. chavani: (A–C) T. sericea, holotype, Tsingy Beanka, max. diameter 37.3 mm, height 18.9 mm, AMS C.474166; (D, E) adult teleoconch sculpture of T. sericea (holotype) and T. chavani (NMSA L8447) respectively, scale bars = 2.5 mm.
Fig. 21. Bathia madagascariensis Robson, 1914 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 21. Bathia madagascariensis Robson, 1914: (A–C) Tsingy Beanka, st'n 03/12, max. diameter 24.4 mm, NMSA L8829; (D) Tsingy de Namoroka, st'n 930/97, max. diameter 19.5 mm, NMSA L8828.
Fig. 8 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 8. Tropidophora secunda Fischer-Piette & Bedoucha, 1965, radula, NMSA L7040: (A) entire width of radula, scale bar = 200 μm; (B) rachidian and inner lateral teeth, scale bar = 50 μm; (C) outer lateral and marginal teeth, scale bar = 50 μm.
Fig. 7 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 7. Tropidophora secunda Fischer-Piette & Bedoucha, 1965: (A–C) Tsingy Beanka, st'n 03/06, max. diameter 21.5 mm, NMSA L7040; (D) Tsingy Beanka, st'n 03/06, subadult, max. diameter 20.0 mm, NMSA L7040; (E) Kelifely Plateau, max. diameter 18.8 mm, NMSA L6798; (F–H) holotype (faded), 'Madagascar', Cuming collection, max. diameter 22.0 mm, NHMUK 20110470.
Fig. 12 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 12. Ampelita andriamamonjyi sp. n.: (A–C) holotype, max. diameter 29.3 mm, height 15.1 mm, AMS C.474164; (D–F) paratype, max. diameter 27.7 mm, height 14.5 mm, NMSA L8441/T2657.
Fig. 4 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 4. Tropidophora chavani Fischer-Piette, 1949: Tsingy Beanka, st'n 15/06, max. diameter 27.0 mm, NMSA L7129.
Fig. 6 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 6. Tropidophora humbug sp. n., radula, paratype NMSA L7042/T2961: (A) entire width of radula, scale bar = 250 μm; (B) rachidian and left inner lateral teeth, scale bar = 100 μm; (C) right outer lateral and marginal teeth, scale bar = 100 μm.
Fig. 3 in New species of land snails (Mollusca: Gastropoda) from two isolated karst formations in central western Madagascar: Tsingy Beanka and Antsingimavo, with additional notes on other regional endemics
Fig. 3. Acroptychia bathiei Fischer-Piette & Bedoucha, 1965, radula, NMSA L7039: (A) entire width of radula; (B) oblique view of left half row. Scale bars = 100 μm.
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