Geomorphic Processes: Exogenic and Endogenic PDF

GEOMORPHIC PROCESSES: EXOGENIC AND ENDOGENIC CHARMAINE GRACE N. TREYES EARTH SCIENCE Kapurpurawan Rock Formation (Ilocos Norte) Alapad Rock Formation – Batan, Batanes Animasola Island – Masbate Apo Island Rock Formation – Negros Oriental  GEOMORPHIC PROCESSES means bringing about changes...

GEOMORPHIC PROCESSES: EXOGENIC AND ENDOGENIC CHARMAINE GRACE N. TREYES EARTH SCIENCE Kapurpurawan Rock Formation (Ilocos Norte) Alapad Rock Formation – Batan, Batanes Animasola Island – Masbate Apo Island Rock Formation – Negros Oriental  GEOMORPHIC PROCESSES means bringing about changes in the configuration of the Earths surface, due to physical stresses and chemical actions on materials present on earth. processes which create and modify landforms on the surface of the earth The physical and chemical action are due to endogenic and exogenic forces.  EXOGENIC PROCESSES The exogenic processes obtain their energy from the gradients generated by tectonic factors, processes, their corresponding driving forces and atmosphere determined by the energy from the sun. Precipitation and temperature are the two significant climatic components that regulate different processes. Whole exogenic geomorphic processes are covered under a common term, denudation which means to uncover. Weathering, transportation, and erosion are comprised of denudation. Gravitational force acts upon every material on earth having a sloping surface and incline to create the movement of matter in downward slope direction.  EXOGENIC PROCESSES Also called Gradational Processes, they comprise degradation and aggradation – they modify relief → a continuum of processes – Weathering → Mass Wasting → Erosion → Transportation → Deposition → these processes are carried through by Geomorphic Agents: gravity, flowing water (rivers), moving ice (glaciers), waves and tides (oceans and lakes), wind,plants, organisms, animals and humans  EXOGENIC PROCESSES Degradation Processes → Also called Denudation Processes Weathering , Mass Wasting, Erosion and Transportation Aggradation Processes Deposition – fluvial, eolian, glacial, coastal  EXOGENIC PROCESSES Degradation Processes degradation refers to the lowering of a riverbed, due the removal of sediment Aggradation Processes Aggradation is the process by which sediment is built up over time in a river or similar environment.  ENDOGENIC PROCESSES processes are driven by the internal heat of the Earth, which in turn results from the radioactive decay of elements deep beneath the surface. This heat bubbles upward providing a huge driving force that bends, cracks, lifts, and moves Earth's rigid outer layer. Occasionally we see this rising energy empty directly onto the surface in molten lava.  ENDOGENIC PROCESSES Main energy - Energy emanating from within the earth Generated from – radioactivity, rotational and tidal friction and primordial heat Geothermal gradients and heatflow Not uniform  ENDOGENIC PROCESSES Diastrophism – All processes that move, elevate, or build up portions of the earth’s crust  DIASTROPHISM Orogenic – process of mountain building through severe folding and affecting long and narrow belts of the earth’s crust Continental-size mountain systems that develop along an entire continental margin as a result of the convergence and accretion of two or more tectonic plates  DIASTROPHISM Epeirogenic – processes involving uplift or warping of large parts of the earth’s crust Continental building process  DIASTROPHISM Earthquakes – involving local relatively minor movements  DIASTROPHISM Plate Tectonics – involving horizontal movements of crustal plates  ENDOGENIC PROCESSES Volcanism – includes the movement of molten rock (magma) onto or toward the earth’s surface and also formation of many intrusive and extrusive volcanic forms