...G. Bronner; J. J. Chauvel Abstract The Precambrian basement of the Tiris region (F'Derik area, Mauritania) contains two iron-formations. One is in the catazonal Tiris Group and the other in the epi- to mesozonal Ijil Group. The Ijil Group forms allochthonous outliers overlying the Tiris Group...

.... Contrast of folds to the north and south of the Tiri River-Harn Magra-Ruparia fault is notable. While the Zawar Mala-Shisha Magra areas are northerly plunging anticlines, the Mochia-Balaria areas lie on a westerly plunging fold. Isoclinal character of these folds are dominant. Major types of folding are (1...

..., ponds, wells and municipal taps. River Kharkara passes through Khetri and Tiri river passes througb Zawar. These rivers regularly receive effluents from ore processing and smelting units. Water from these rivers are occasionaUy utiJized for irrigation. Samples were taken from the rivers at different...

...FIGURE 2. The Tiris complex near Zouerate in the western Rgueïbat Shield hosts iron deposits in Mesoarchean (Guelb el Rhein) to Paleoproterozoic (Guelb Mhaoudat and TO14) rocks. Geophysical targeting, using total field magnetic data above 0.75 (green) over regions where the depth to magnetic...

..., Garhwal. Rec, Geol, Surv, India, v . 18, pt. 2, PI'. 73-77. , - - (I887) Physical Geology of West British Garhwal; with a note on a route traverse through Jaunsar, Bawar and Tiri Garhwal. Rec. Geol. Surv: India, v. 20, pt. I, PI'. 26-40. SHANKER, R., DHOUNDIAL,.J. N. and KAPOOR, H. M., (1973) The age...

... [ (OH)2TiSh022] (TiRI), at 20 mol% intervals, were run simul­ taneously (Della Ventura & Robert, 1988). The material we examined ranges in composi- tion from RIsoTiRI20 to RloTiRIlOO. However, only sampies containing 20, 40 and 60 mol% TiRI are homogeneous amphiboles (Della Ven­ tu ra et al., 1991...

.... Data sources: Penge BIFs (Bau & Dulski, 1996 ); Ntem Complex BIFs (Kouambo: Ganno et al. 2017 ; Bikoula: Teutsong et al. 2017 ; Kpwa-Atog Boga: Soh Tamehe et al. 2018 ; Nkout: Ndime et al. 2019 ); African BIFs (Tiris Complex BIFs from Mauritania, West Africa: Taylor et al. 2016...

... Guelb er Richat Granites of experienced logistical and material providers. Territorial Semsiyat dome Archean 20° N 20° N Guelb Greenstone belts Nich Granites disputes between neighbors to the north and Toureg uprisings Fig. 3 SudAkjoujt Tiris Complex Amsaga Complex in Mali, Mauritania s neighbor...

... of Whangaparaoa Peninsula and Tiri Tiri Island. These higher velocities, however, result from constriction of the tidal flow in the narrow passage ( Black et al., 2000 ). At the study site, the coastal cliff of the peninsula is fronted by a marine abrasion platform cut on deformed Miocene flysch deposits...

... reported by Kirstein et al . (2006 ) (Figs 2 and 4 ). Of these combined samples 19 are from the Ladakh Batholith and one from the Tirit Batholith (Tiri 3240) NW of Satti (Fig. 2 ). A north–south section was sampled across the batholith from Leh to Tirit with additional samples from along the southern...

... area ( Fig. 1 ). It forms part of an arcuate unit of Mesoarchaean supracrustal rocks, which is contiguous with Mesoarchaean supracrustal rocks of the Tiris Complex of the Zouerate district, part of the Choum–Rag el Abiod Terrane ( Pitfield et al . 2005 ) to the SW. Their age has not been constrained...

... Alluvial-Proluvial Plain in China: An Example from Western Yongqing County . Water , 14 (15) , 2395 . https://doi.org/10.3390/w14152395 . Belkhiri L. , Mouni L. and Tiri A. (2012) Water-rock interaction and geochemistry of groundwater from the Ain Azel aquifer, Algeria...

... methods. Environ. Earth. Sci. 79 , 1 – 21 . https://doi.org/10.1007/s12665-020-08905–8 . Belkhiri , L. , Tiri , A. and Mouni , L. ( 2020 ) Spatial distribution of the groundwater quality using kriging and Co-kriging interpolations. Groundw. Sustain. Dev. 11 , 100473 . https...

.... and Tiri , A. (2011) Water-rock interaction and geochemistry of groundwater from the Ain Azel aquifer, Algeria . Environ Geochem Health . doi: 10.1007/s10653-011-9376-4 . Carlson , T.N. and Azofeifa , S.G.A. (1999) Satellite remote sensing of land use changes in and around San...

..., and the investigation of the development and maintenance of sediment structures and bedforms in rivers. We used PIT tags developed by TIRIS Technology and distributed by Texas Instruments. We chose PITs of 23.1 ± 0.5 mm long and 3.85 ± 0.5 mm in diameter, although other sizes exist ( Fig. 1A ). We used the RI...

... through Jaunsar-Bawar and Tiri-Garhwal, Record Geol. Surv, India, v. 20, pp. 26-40. RAINA B. N. and DUNGRAKOTI, B. D., (1974) Geology of the Area between Nainital and , Champawat in Kumaun, Himalaya, U.P., Fourth Seminar Him. Geol., W.I.H.G.: (Abstract). RUPKE, J., (1974) Stratigraphic and structural...

.... These points must satisfy the equation (2n + 1)2~r2c2 n=0,1,2 Xs + 2 X k = - - 4L2 200 BULLETIN OF TIrIE SEISh~IOLOGICAL SOCIETY OF AI~ERICA The roots of this equation are X = - k 4- iu~, where t / ( n + 1)27r2C2 /c2 7rc (2n -t- 1)~rc But since/c < < -- then ~ 2L 2L T h e residue for the pole at X = - - k -f...

... DIAGENI~SE DU CALICHE: EXEMPLE TIRI~ DE LA FORMATION PLI~ISTOCENE IRONSHORE SUR CAYMAN BRAC, ANTILLES BRITANIQUES RESUME L'Otude d'une couche de caliche de la formation P16istoc~ne Ironshore sur Cayman Brac, Antilles Britaniques, dOmontre que les racines des plantes et les micro-organismes quileur sont...