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Prudhvi Raju, K. N.
- Geomorphology of Visakhapatnam, Andhra Pradesh
Authors
1 Department of Geography, Andhra University, Waltair, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 19, No 1 (1978), Pagination: 26-34Abstract
The major geomorphic units of the town of Visakhapatnam are the hill slope elements of free face and debris slope, along with piedmont fans, colluvium and pediment. Waltair Uplands are mainly made up of small detached hills, large accumulations of red sands, often dissected into miniature badlands, and patches of dune sands. Laterites are present both as altered product of hard rock as weIl as colluvium. The coastal zone contains stacks, wave-cut platform, beach and sand dunes. A study of logs of more than 1000 bores put in the tidal basin and features reported and observed here and elsewhere along the coast indicates that during the commencement of Holocene (since 10,000 years B.P.), the sea level might have been about 7 metres higher than the present sea level before it went down to as low as 25 metres and rising again to the present level.- Photo-Geomorphic Features in Chintapalle Area Over Eastern Ghats in Andhra Pradesh
Authors
1 Department of Geography, Andhra University, Waltair, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 19, No 11 (1978), Pagination: 515-518Abstract
Study of aerial photographs of an area of about 2000 sq km around Chintapalle in Visakhapatnam district of Andhra Pradesh, shows that broad structural trends are clear only where there are no laterite caps. The lateritic cappings show off on higher altitudes with light tone and generally across structural trends. The cappings, aligned ENE-WSW with a general altitudinal accordance, are suggestive of their occurrence over remnants of a single planar surface. The criteria identified may be applicable elsewhere in the Eastern Ghat terrain for locating lateritic cappings. Such an exercise appears vital in the present context, as many of the laterite caps of the Eastern Ghats are proved to be good bauxite deposits.- Fracture Pattern Study from Landsat Imagery and Aerial Photos of a Part of the Eastern Ghats in Indian Peninsula
Authors
1 Department of Geography, Andhra University, Waltair 530003, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 22, No 1 (1981), Pagination: 17-21Abstract
The terrain between the Godavari river in the south and the Mahanadi river in the north, comprising about 50,000 sq. km area forms the study region. LANDSAT imagery and aerial photographs were studied with a view to delineate the fracture patterns and analyse their possible significance. The frequency azimuth rose diagrams of fractures indicate two sets of preferred orientations in ENW-WSW and E-W directions. The possibility of some of these fractures/fracture traces being relatively very much younger to the main Eastern Ghat orogeny is a tentative surmise made from this study. These younger fractures may be related to a cymatogenic upwarp during mid-Tertiary.- Geomorphic Processes in the Formation of (Red) Sands at Bhimilipatnam, Visakhapatnam District, Andhra Pradesh
Authors
1 Department of Geography, Andhra University, Waltair 530003, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 26, No 5 (1985), Pagination: 336-344Abstract
The (red) sands at Bhimili with an areal spread of about 7 km2 and a height of 90 m above M.S.L. adjoining the beach (sea) has a dome like form. Within this, a typical badland topography has been formed. Three horizons of red, white to brownish and white to yellowish sand occur beneath white sand at the top, The red sands are fine-grained. White to brownish sands are coarse and show partially cemented parallel laminations. White to yellowish sands at the bottom, are coarse and pebbly, and stone lines within them occur inclined towards the sea, with small pebbles to boulders at different heights above M.S.L. and at different distances from the sea. A part of the bed of a major stream in the badland is a uniform wave-cut rocky platform, at a height of 7 m above M.S.L.
The height (7 m) of the rocky platform confirms that the sea level was possibly higher. It is inferred that the white to yellowish sand horizon may be a beach deposit, the white to brownish sands to be coalesced dune deposits and the red sand to be of aeolian nature. Statistical values substantiate mixed populations in the dune environment.
- Coastal Geomorphology of Konkan
Authors
1 Department of Geology, Banaras Hindu University, Varanasi 221005, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 41, No 5 (1993), Pagination: 471-472Abstract
No Abstract.- Sea Levels Along Visakhapatnam Coast: A Geomorphic Explanation
Authors
1 Dept. of Geography, Banaras Hindu University, Varanasi 221 005, IN
2 School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110 067, IN
3 Dept. of Geography, Andhra University, Visakhapatnam, 530 003, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 42, No 4 (1993), Pagination: 337-348Abstract
About 120 km of shoreline in north coastal Andhra Pradesh on either side of Visakhapatnam is rocky with a number of headlands aad bays. Surfaces and caves in rocks along this shoreline were mapped, to explain their relation to sea level stands of Holocene. The physiographic status of surfaces at several locations was worked out in terms of their number and area versus altitude. The seaward margins of hills mapped at many sites along the southern part of the shoreline show a distinct orientation of the outline and dominance of a class of surfaces different from those along the northern stretch. This variability is attributed to the concentration and release of energy of longshore drift and to the variable orientation of the shoreline. Surfaces between elevations of 5 and 1 metre above msl dominate the shoreline. The geomorphic characteristics of these surfaces conform well with those of the storm wave platforms. Sea caves are very few and are associated with either horizontal and/or inclined joints or foliation planes. The 'inactive' cliffs with their toes at about 2 metres above msl along with rocky floors/surfaces with sand cover, point to a sea level stand of 1.00-1.50 metres above the (present) mean low tide level (mltl).Keywords
Geomorphology, Sealevel, Visakhapatnam Coast, East Coast, Holocene, Andhra Pradesh.- Landforms of India from Topomaps and Images
Authors
1 Department of Geography, Banaras Hindu University, Varanasi 221 005, IN
Source
Current Science, Vol 107, No 9 (2014), Pagination: 1602-1603Abstract
No Abstract.- Palaeo and Present Channel of Assi River, Uttar Pradesh, India
Authors
1 Department of Geography, Institute of Science, Banaras Hindu University, Varanasi 221 005, IN
2 Water Resources Assessment Division, National Remote Sensing Centre, Indian Space Research Organisation, Hyderabad 500 037, IN
Source
Current Science, Vol 118, No 4 (2020), Pagination: 630-639Abstract
The Assi river in Varanasi, Uttar Pradesh, India, is now a small, local, ephemeral floodplain tributary of River Ganga, with a length of about 8 km and catchment area of about 22 km2. It has also turned into a filthy drain. There are evidences in the form of palaeochannels, through patterns of water bodies and settlements along them, to suggest the origin of Assi river near Allahabad flowing through a distance of about 120 km up to Varanasi to meet the Ganga. There is also the possibility that Assi started as a takeoff from River Ganga and flowed as a Yazoo stream. Through on-screen digitization from high and medium-resolution remote sensing data – BHUVAN and Google Earth, CORONA aerial photographs, IRS P6 LISS-IV, Landsat 1, 3, 5, 7, 8 – and a number of cross profiles from SRTM 30 m digital elevation model (DEM), palaeochannel of Assi has been delineated. Also, a 1 m DEM was generated for the present Assi catchment area from about 5000 DGPS points to present proof that the present Assi is a misfit in once a wider valley shaped by heavy discharge coming from a greater length of channel and a larger catchment area.Keywords
Catchment Area, Flood Plains, Palaeochannel, Remote Sensing.References
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