China
Africa
Explore chapters and articles related to this topic
Ethnomedicinally Important Pteridophytes of Kolli Hills from Eastern Ghats, India
Published in Parimelazhagan Thangaraj, Phytomedicine, 2020
Muniappan Ayyanar, Jeyalatchagan Sureshkumar
The geology of the area is characterized by charnockite associated with gneisses and metamorphic rocks (Ramesh and Anbazhagan 2015). December and January are the coldest months (15°C), whereas a higher temperature (35°C) is noticed during March to June. The mean annual temperature in the hills ranges from 15°C to 35°C during March to June and the average between 18°C and 25°C during October to January. The annual rainfall is between 300 and 750 mm. The water holding capacity of the hills is 40%, and the soil type varies between red to black clay. It has a mild climate, and the location is known for the cultivation of cash crops like banana, jackfruit, pineapple, etc. The Kolli Hills are frequently visited by nature lovers, trekking fans, tourists, and meditation practitioners (Bharath and Raj 2016). The famous Lord Siva Arappaleeswarar Temple, horticulture farm, herbal farm, Agaya gangai waterfalls (300 ft), boathouse, Ettukai Amman Temple, Periya Swamy Temple, pineapple farms, viewpoints, and telescope house are the places attracted by the tourists.
Effect of spatial resolution and data splitting on landslide susceptibility mapping using different machine learning algorithms
Published in Geomatics, Natural Hazards and Risk, 2021
Minu Treesa Abraham, Neelima Satyam, Prashita Jain, Biswajeet Pradhan, Abdullah Alamri
More than half of the area of Idukki belongs to forest and the rocks are composed of peninsular gneissic complex, migmatite complex and charnockite group from north to south (Department of Mining and Geology Kerala 2016). The rocks of the Peninsular gneissic complex are found in the northern part of the district. The granite gneiss rocks of Archean age are very hard and well foliated. The central area of the district is dominated by the migmatite complex, represented by biotite gneiss and hornblende biotite gneiss. Similar to the peninsular gneissic complex, migmatite complex is also very hard and foliated (Department of Mining and Geology Kerala 2016). A major portion of the district in the southern and south central part is composed of rocks of charnockite group, represented by pyroxene granulite, magnetite quartzite and charnockite (Geological Survey of India 2010). Among these, charnockite is spread across the area and the other two are found as linear bands, aligned parallel to the foliation trend. Minor fraction of Khondalite group, acidic intrusive and basic intrusive rocks are also found across the district, along with the other three major groups. The lower elevation region in the western part of the district (Figure 1) belongs to pediment complex, while the remaining area is formed by structural cum denudational hills, on Precambrian rock formations. The region consists of hills with thin cover of soil, laid over the basement rocks. The highly dissected hills and valleys of the district are prone to landslides and cause severe destruction. The forest cover of the region is composed of thick forest loam soil, formed by weathering of rock, rich in organic matter (Department of Mining and Geology Kerala 2016). The midlands of the district, with lesser elevation, are composed of lateritic soil with less organic content and high permeability. The valley regions of the district are composed of transported soil, with fine particle size, and the river banks are formed by highly fertile alluvial soil (Department of Mining and Geology Kerala 2016).