User talk:Riazyach

The objectives of the present studies are

1.To understand Sedimentology, Geochemistry and Morphology of volcanic ash particles.

2.To evaluate Geomorphology features of ash from different sites deposited in different environments

The river Gundlakamma originates in the Nallamalai hill range andflows through various litho assemblages of Cuddapah Super group, Archaean granites, gneisses, schists and granulites before joining the sea at Ongole. The Gundlakamma river basin is bounded by latitudes 15º05’ x 16º30’ and longitudes 79º05’ x 80º00’. The study delineated the quaternary sediments, classified and established its stratigraphy and unraveled the neo-tectonic history the area.

The Quaternary Geological studies of Gundlakamma river basin was not carried out in the past except for the coastal part of this river by Kareemuddin in late seventies and V.Rengamannar during 1983–84.

They delineated the coastal features like active beach, palaeo beach ridges, tidal flats and the floodplain of the river in the vicinity of the coast.

A brief mention of geology of the inland parts of this river was made by King and Bruce Foote. They opined it could be a good treasure trove of fossils as it had a thick forest cover in the past and faunal assemblage.

The sites namely Ainavolu, Jamuladaka, Venkatapuram, Kottapalem, Peddavaram, Gokanakonda are the areas that are situated all along the bank of Gundalakamma River.

Climate shows arid with shrub coppice vegetation cover. Study area receives annual average precipitation from SW monsoon 400-600mm.

Geology and Geomorphology

The river Gundlakamma originates in the Nallamalai hill range and flows through various litho assemblages of Cuddapah Super group, Achaean granites, gneisses, schists and granulites before joining the sea at Ongole.

The study area is unusually flat in nature suggesting that it mighthave undergone intense peneplantation. The factors responsible for the acceleration of this process could be the composition of the lithounits and major structural features like, folds, faults and master joints. However the harder resistant bodies such as quartzites near Markapur and variety of granites and gneisses near Vinukonda, Addanki and Chimakurthy stand out prominently in the vast pediplain.

The drainage network of Gundlakama river is controlled by the fracture pattern prevailing in the country rock. The general directions of which are N20ºE –S20ºW, NWSE and E-W. The major tributaries of Gundlakamma are Duvvaleru, Dharbhagiri, Valavagu, Kankeru, Pasupuleru, Kandleru, Tigaleru and Chilakaleru most of which come from the north, west-south-west or from the east.

The Gundlakama river course is NNE-SSW between Khambham and Duppadu, which coincides with the regional trend of Cuddapah rocks, E-W between Tripuranthakam and Enugupalem, which happens to be the regional fracture direction in gneisses. Between Enugupalem and Addanki it has a NW-SE direction.

The drainage pattern of Gundlakama river is of sub-dendritic to sub-parallel in nature.

Field Work

The location for the field study are Ainavolu, jamuladaka, venkatapuram, kottapalem, peddavaram, gokanakonda are the areas that are situated all along the bank of Gundalakamma River.

LITHOLOGGING

he vegetation was cleared at each point and the vertical litho section was cleaned.

Samples were collected using a shovel and collected in sample bags, marked and stored. GPS readings were noted for each site and marked on the map.

The collected samples were then dried up at 500c at hot air oven in the laboratory and then used for various analyses Riazyach (talk) 12:00, 15 December 2015 (UTC)