Kicau Lebah

DefinitionMetamorfosisme process is a process that causes changes in mineral composition, texture and structure on the rocks because of heat and high pressure, as well as the active chemical solution. The end result of the process metamorfisme is metamorphic rock. So rocks are igneous rocks formed by processes metamorfisme on pre-existing rocks. Rock (which had existed previously) can be igneous,...

Origin of Peat (Peat)The coal is generally derived from peat (peat) deposits in a swamp. Important factors in the formation of peat:Evolution of floral developmentClimate Geography and regional structuresEvolution of Flora DevelopmentThe oldest coal-old from Michigan Central Hurorian derived from algae and fungi. While in the Lower and Upper Devonian era, mostly from coal Psilophites (spt: Taeniocrada...

Throughout the world karst landscapes vary from rolling hills dotted with sinkholes, as found in portions of the central United States, to jagged hills and pinnacle karst found in the tropics. The development of all karst landforms requires the presence of rock which is capable of being dissolved by surface water or ground water. The term karst describes a distinctive topography that indicates dissolution...

The degree of development of karst landforms varies greatly from region to region. Large drainage systems in karst areas are likely to have both fluvial (surface) and karst (underground) drainage components. As stated in the introduction, the term karst describes a distinctive topography that indicates dissolution of underlying rocks by surface water or ground water. Water falls as rain or snow and...

Bowen found by experiment that the order in which minerals crystallize from a basaltic magma depends on temperature. As a basaltic magma is cooled Olivine and Ca-rich plagioclase crystallize first. Upon further cooling, Olivine reacts with the liquid to produce pyroxene and Ca-rich plagioclase react with the liquid to produce less Ca-rich plagioclase. But, if the olivine and Ca-rich plagioclase are...

Volcanic eruptions, especially explosive ones, are very dynamic phenomena. That is the behavior of the eruption is continually changing throughout the course of the eruption. This makes it very difficult to classify volcanic eruptions. Nevertheless they can be classified according to the principal types of behavior that they exhibit. An important point to remember, however, is that during a given...

Volcanic EruptionsIn general, magmas that are generated deep within the Earth begin to rise because they are less dense than the surrounding solid rocks.As they rise they may encounter a depth or pressure where the dissolved gas no longer can be held in solution in the magma, and the gas begins to form a separate phase (i.e. it makes bubbles just like in a bottle of carbonated beverage when...