Essay about Geology Field Work

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The area of Kuncizzjoni and Fomm ir-Riħ is found at the edge of the Victoria lines. It lies between a system of horst and graben. Kuncizzjoni is uplifted on a horst feature, which carries the Victoria lines that are built across the Great Fault. Alluvial deposits are found in the valleys due to the percolation of the rain water down to the lowest plains, and because of the high percentage of clay found in the soil. Clayey soils made the valley an ideal place to terrace fields for agricultural purposes. Consequently, this leaves little space for natural vegetation to grow. Northwest wind or Mistral is the predominating wind in the area. A southeast tilt occurs on the Island, distributing most cliffs towards the western side of Malta and …show more content…
Eventually the rocks will accumulate under the sea to form a boulder field.
Geomorphological Processes
Weathering helped shape the plateau landscape that stretches over Fomm ir-riħ, Ras il-Pellegrin and Karraba. Several formations could be observed from Kunċizzjoni. These include: sheer sea cliffs, a rift valley, clay talus, boulder scree, boulder field, karst and horst & graben system. Moreover, a small sandy beach could be seen below a large clay talus next to Karraba.
Sheer sea cliffs
Sheer sea cliffs formed when the Islands were uplifted due to tectonic activity in the Mediterranean. Different layers of rock formed during different geological periods and were laid in chronological order with the oldest layer, Lower coralline limestone, found at the bottom and with the youngest layer, Upper Coralline limestone, at the top. Greensand and Blue clay are found underneath Upper Coralline limestone and are relatively soft, brittle layers. The Upper Coralline limestone erodes vertically to form cliffs and has a Mesa landscape.
Water is the key element that erodes through the layers of rock in cliffs. Water vapour reacts with gases in the air, such as sulphur dioxide (SO¬¬2) and nitrogen dioxide (NO2), to form sulphuric acid (H2SO4) and nitric acid (HNO3), both of which are components of acid rain. The weak acids will in turn react with limestone which contains calcium…