Wednesday, January 25, 2012

Terraces

Terraces are step-like structures formed along the banks of the rivers.The decrease in the level of river due to its erosional activity is called Degradation and the terrace formed is called degradational terrace.The increase in the level of the river due to accumulation of materials on its bed is called aggradation. Due to seasonal  oscillations of the sea-level or fluctuations of climate or tectonic movements of the ground the river undergo a series of such degradation an aggradations thus forming a succession of terraces.Generally the highest terrace will be the oldest since it is first formed and the subsequent terraces will be younger or more recent as they are formed later.

According to their modes of origin three kinds of terraces are seen
Tectonic terrace which are formed due to sudden tectonic movement of the earth's super crust bringing about a subsidence or an uplift  of part of the river's course like that of a waterfall thus forming a terrace.

Thallassostatic Terraces are formed due to fluctuations in the sea level.These fluctuations of the sea-level are called eustatic.

Climatic terraces  are formed due to various climatic fluctuations.Generally during wet climatic conditions degradational terraces are formed and during dry climatic conditions aggradational terraces are formed.

No comments:

Labels

Aboriginal (1) Acheulian tool (1) Age-Groups (1) Alliance (1) Animatism (1) anthropology (1) Anthropology of Art (1) Ashrama system (1) Associations (1) Attributes of Culture (1) autochthony (1) avoidance (1) Basics (1) bio ethics (1) biological adaptation (1) Birsa Movement (1) Bongaism (1) branches of anthropology (1) Bride Wealth (1) Cargo Cults (1) Castes among Muslims (1) Catholics (1) civilization (1) Clifford Geertz (2) Cognitive Anthropology (1) Compadrazgo (1) Cope's law (1) Cross Cousin (1) cultural anthrology (1) Cultural Borrowings (1) cultural citizenship (1) Cultural Ecology (1) Cultural imperialism (1) Cultural Materialism (1) cultural rights (1) culture (2) Culture and Motive (1) Darwinism (1) Demographic Transition (1) Derek Freeman (1) descent (2) Deviance (1) Diffusionism (1) DNA (1) DNA Technology (1) dollo's law (1) Dormitories (1) Dowry (1) Durkheim (1) Early Human Ancestors (1) Eco System Concept (1) Ecological Anthropology (1) Edward Sapir (1) emic/etic (1) Endogamy (1) Environment (1) Eskimo System of Kinship (1) Ethnicity (1) Ethnocentric (1) ethnoecology (1) Ethnographic Monographs (1) ethnography (1) Evans Pritchard (2) Evolutionism (1) Exogamy (1) Extended family (1) family (2) Female Genital Mutilation (1) Feminism (1) field studies (1) fieldwork (1) Flake Culture (1) folklore (1) fossil (1) Functional Theories on Primitive Religion (1) Gause's law (1) gender bias (1) Gender expectations (1) Generalized Exchange (1) Genetic Adaptation (1) Genetic Change (1) Genetic Screening (1) Genetics (1) Genetics and its Relevance to Physical Anthropology (1) George Peter Murdock (1) Hardy-Weinberg Law of Equilibrium (1) Hawaiian System of Kinship (1) Hominids (1) Homo Erectus (1) Homo Habilis (1) Homo Hierarchies (1) honor killing (1) Human Evolution (1) human rights (1) Incest prohibition (1) Independent Invention (1) indian anthropology (1) Indigenous People (1) Indus Valley Civilization (1) Intellectual Property Rights (1) Iroquois System of Kinship (1) J.C Frazer (1) jajmani system (1) Jean Baudrillard (1) Jean Dreze (1) Joint Family (1) Joking Relationship (1) Julian Steward (1) kin (1) Kin Behaviour (1) kindred (1) law (1) Leslie White (1) Levirate (1) Lucy Mair (1) magic science (1) Mandelbaum (1) Marcel Mauss (1) Marett (1) Margaret Mead (1) Marxism and Anthropology (1) Mendelian Principle (1) Michel Foucault (1) Microliths (1) Middle Palaeolithic Culture (1) Migration and tribal communities (1) modernization (1) multiculturalism (1) Mysore (1) myth (1) Nadel (1) Neanderthal Man (1) Non Unilineal or Cognatic Systems (1) Notes and Queries (1) Nuclear Family (1) Nuer (1) Organic evolution (2) origin of state (1) origins (1) Oscar Lewis (1) Paleo River (1) Parallel Cousin (1) Participatory Rapid Assessment (1) Patterns of Culture (1) Pedigree Analysis (1) Polyandry (1) Polygyny (1) Population Genetics (1) Pre-history (1) PreHarrapan settlements (1) primitive (1) profane (1) Proto- history (1) Purushartha (1) Race (2) racism (1) Radcliffe-Brown (1) Recombinant DNA Technology (1) Reflexivity (1) Reinventing Anthropology (1) Religion (2) Religion and science (1) religious beliefs (1) research (1) Restricted Exchange (1) Rhina (1) rig vedic society (1) Robert Redfield (1) Rules of Residence (1) Ruth Benedict (3) sacred (1) Sacred Complex (1) Sacrifice (1) San hunter-gatherers (1) sanction (1) Scheduled Areas (1) scope of anthropology (1) Secret Societies (1) sex-gender (1) Sir James George Frazer (1) Social Institutions (1) Social Network (1) Social-Psychological Perspectives (1) society (1) sorcery (1) Sororate (1) state (1) Status (1) Status of women in tribal society (1) Stebbins (1) stone age communities (1) stone tools (1) Style of Life (1) symbolic culture (1) Symbolism (1) Syncretism (1) Synthetic Perspectives (1) Taboo (1) Teknonymy (1) terraces (1) Textual Approach and Contextual Approach (1) The Golden Bough (1) Thomas Malthus (1) tobacco (1) Totem (1) Trade and Barter (1) Tradition (1) Transactionalism (1) Tribal Religion (1) Tribal Sub plan (1) tribe (1) Upper Palaeolithic (1) Upper Palaeolithic Period (1) urban revolution (1) Urbanization (1) witchcraft (1) world's population 2012 (1)

Popular Posts

Blog Archive

Subscribe Now: bloglines

Subscribe in Bloglines

Top Education Sites
anthropology,anthropologyguide
Flipkart.com