Ore image classification based on small deep learning model: Evaluation and optimization of model depth, model structure and data size

Large depressions, thickened terraces, and gravitational deformation in the Ebro River valley (Zaragoza area, NE Spain): Evidence of glauberite and halite interstratal karstification

Holocene tectono-geomorphic evolution of parts of the Upper and Middle Gangetic plains, India

Sous le prisme de la pluridisciplinarite, la dichotomie entre anthropisation et environnement s’est reduite a mesure que de fortes interrelations dans les seuils d’evolution ont ete demontrees Les vallees fluviales constituent des supports d’observation privilegies des relations hommes-milieux, et de nombreux fleuves ont fait l’objet de ce type d’etude ces dernieres annees Le choix de la Garonne s’est impose face au vide scientifique qui caracterise une grande partie du trace au sein du Sud-Ouest de la France, en particulier la section moyenne Ce travail se concentre donc sur l’etude des relations entre le peuplement et la basse plaine entre Toulouse et la confluence du Tarn depuis 10000 ans La vallee atteint 25km de large a Toulouse et correspond a la premiere zone d’etalement des crues pyreneenne, favorable a l’enregistrement des occupations passees et de la dynamique alluviale qui les a accompagnes En l’absence de referentiel local, un cadre chronologique geomorphologique et archeologique a ete mis en place pour l’Holocene a partir des travaux realises sur differents cours d’eau europeens et continentaux Ces deux volets ont ensuite ete analyses distinctement sur la plaine de la Garonne a l’aide d’une methodologie pluridisciplinaire Les resultats montrent que l’occupation de la plaine alluviale est continue depuis le Neolithique, malgre une restitution biaisee par les travaux d’amenagement modernes et la taphonomie Cette derniere est marquee par une forte mobilite du chenal de la Garonne et l’identification d’au moins deux episodes d’incision au cours du 2nd l’Holocene et une nette diminution de l’alluvionnement depuis l’Antiquite

https://tel.archives-ouvertes.fr/tel-01246400/document

La plaine alluviale de la Moyenne Garonne toulousaine au cours de l’holocène : apport d’une approche croisée archéologie et géomorphologie

Terminal fans and the Ganga plain tectonism: A study of neotectonism and segmentation episodes of the Indo-Gangetic foreland basin, India

Concealed thrusts in the Middle Gangetic plain, India – A ground penetrating radar study proves the truth against the geomorphic features supporting normal faulting

Haryana plain is the drainage divide between the Ganga plain in the east and the Indus plain in the west. Being a part of the Himalayan foreland, its geomorphology, sedimentation processes, and tectonism are broadly controlled by the Himalayan tectonics. Soil and geomorphological mapping in Haryana plain bring out geomorphic features such as paleochannels, various active drainage patterns, and landforms such as old fluvial plains, floodplains, piedmonts, pediments, terminal fans, and eolian plains. Based on the degree of soil development, and Optical stimulated luminescence (OSL) ages, the soil-geomorphic units were grouped into six members (QIMS-I to VI) (Quaternary Indus Morphostratigraphic Sequence) of a morphostratigraphic sequence: QIMS-VI 9.86–5.38 Ka, QIMS-V 5.38–4.45 Ka, QIMS-IV 4.45–3.60 Ka, QIMS-III 3.60–2.91 Ka, QIMS-II < 2.91–1.52 Ka, and QIMS-I < 1.52 Ka. OSL chronology of different geomorphic features suggests six episodes of tectono-geomorphic evolution in the region since 10 Ka. Neotectonic features such as nine faults, two lineaments, and five fault-bounded tectonic blocks have been identified. Independent tilting and sagging of the blocks in response to neotectonics have resulted in modification of landforms, depositional processes, and hydro-geomorphology of the region. Major rivers like the Yamuna, the Ghaggar, and the Sutlej show different episodes of shifting of their courses. Lineament controlled few extinct channels have been recorded between 20 and 25 m depth below the surface in the ground-penetrating radar (GPR) profiles. These buried channels are aligned along the paleo-course of the Lost Saraswati River interpreted from the existing literature and hence are considered as the course of the lost river. Seven terminal fans have been formed on the downthrown blocks of the associated faults. The Markanda Terminal Fan, the first of such features described, is indeed a splay terminal fan and was formed by a splay distributary system of the Markanda River. Association of three terminal fans of different ages with the Karnal fault indicates the segment-wise development of the fault from west to east. Also, comparison with other such studies in the Ganga plain to further east suggests that the terminal fans formed by streams with distributary drainage pattern occur only in semiarid regions as in the present area and thus are indicators of semiarid climate/paleoclimate. Though the whole region is tectonically active, the region between the Rohtak fault and Hisar fault is most active at present signified by the concentration of earthquake epicenters.

Vivekanand Acharya

Papers

Holocene tectono-geomorphic evolution of parts of the Upper and Middle Gangetic plains, India

Concealed thrusts in the Middle Gangetic plain, India – A ground penetrating radar study proves the truth against the geomorphic features supporting normal faulting

Holocene tectono-geomorphic evolution of Haryana plains, Western Ganga plain, India

Holocene Tectono-Sedimentary Evolution of the Haryana Plains, India