Geography SBA Essay

To identify and explain the processes which led to the recoilation of limest unrivaled in the regions of slow take the air, Lluidas Vale, Ty Dixon and Moneague.methodological analysisOn May 20, a group of 4th strain geographics students from Meadowbrook High visited the different limestone argonas of Lluidas Vale and The Ty Dixon Caves in St.Catherine, and Moneague in St. Anns. I sedate data by means of photography and jotting down definitive details. As well as use of the senses, visual being the just about effective, as well as tactile perception which was in like manner effective. We went on to the various stops I took my notes and asked questions thus elaborating on what I didnt grasp properly.As the tour guide, Mr. Daley, explained the different features, expounded on their formation as well as provided suggestions for the SBA composition. This information benefits as secondary information. I approach only one ch all toldenge which was traversing the landscape in unsu itable footgear and inclement weather. Nevertheless I managed to capture the essence of the arenas and their features. I essay to capture the images on the camera as best as I could, by experimenting at different angles, ranges and utilizing close ups to capture the general importance. outline & Discussion forbear 1 Bog Walk englutOur first stop was along the road within the Bog Walk Gorge, located 5 miles south of the Bog Walk Village one of the oldest historic towns in Jamaica. While at this kettle of fish, it was seeming(a) that the limestone feature create was composed of pure limestone, because the lighter the rock is in color, is the purer its composition of limestone is. It was excessively spy that chemical weathering, the change in the chemical structure and sometimes physiologic appearance of a rock, was acting upon the rock in the form of carbonation. This is the reaction of rain weewee system, carbon dioxide and limestone to form atomic number 20 bicarbon ate, a weak carbonous acid which is soluble, making the rock easy to decompose when it comes into contact with water. Clints and Grykes were evident, as visible in figure 1.0, contri provideding to weathering. Clints and grykes are a top of carbonation in the weaker joints and cracks of a rock leaving ridges and groves. The ridges are Clints and the groves are grykes. stand up 1.0 (Chemical weathering acting on the rocks)The entire gorge is rich with lush and vary vegetation which makes for some impressive and dramatic scenery. Another feature organise at the gorge was a cavern, which is a enormous extensive cave with a deep chamber and interconnecting passages. When the roof of a cave collapses, large depressions called gorges result, hence the name Bog Walk Gorge. The gorge was primarily an underground river system which collapsed. The cliffs on both sides of the gorge seemed to still feature potential to collapse. The master(prenominal) river has a tributary coming from the Above Rocks govern located in St. Andrew. The major river processes in the area are hydraulic Action, the sheer force of flow water on the base of the river bed, and Attrition, when rocks, carried by the river, smash together and break into modester, smoother particles. Stop 2 The Bog Walk BridgeOur second stop was made at the entering to the Pleasant Hill Community, The Bog Walk Bridge 83.9 km extraneous from Kingston. Here we examined a bridge which was oxidizing. This is a chemical reaction in which substances combine with oxygen to form an oxide For example, the combination of iron with oxygen to form an iron oxide (rust). I saw ridges which descended from the mountains to the lower part. These are called interlocking spurs. at that place was also a flood warning system present as well. It showed the heights of the river and the level of seriousness to be taken hence fill must be a menace to this community. Gabion basins were also observed along the banks to he lp keep them in place. The width of the river was approximately 10-13m wide (at points). place 2.0 (example of oxidation)Stop 3 Lluidas Vale, St. CatherineOur third stop was at Lluidas Vale, worthy commonality in St. Catherine. At this location we observed a sinkhole which was its main feature. A sinkhole is when a joint becomes enlarged to such an result that a deep vertical hole is created, down which a surface may disappear. A sinkhole was created due to a tributary menstruation onto the surface and came upon the land rising upward and erode the foot of the slope. extra time the tributary then began to flow underground. Not much water was observed on the surface. The land closer to the sinkhole appeared somewhat moist. A Polje was evident at this location this is an elongated depression or basin, formed by the synchronization of caves. A polje is found in karstic geological regions of the world, with areas usually 5 to 400 km. The polje occurs in troy weight Formation. This limestone feature is displaced by NE-SW trending faults to assume large-scale fault traps, which are important controls on the geomorphology of the area. morphology is the scientific study of landforms and the processes that shape them. A more recent alluvial and limestone debris cover occurs within the vale, whereas the swallowly sloping rim of the polje to the west, unification and east is within Troy Formation limestone group.To the south and southwest of the vale, rocks of the lily-livered Limestone Group crop out, season further south older cretaceous volcanic and sedimentary strata are exposed. In Luidas Vale processes are dominated by mass is a plateau area that has been severely eroded so that the relief is sharp. The icteric Limestone Group consists of limestones (Stettin and Chapelton Formations) and clastic rocks (E.g. Guys Hill Formation). The limestone of the Yellow Limestone Group give rise to doline karsts, with low residual pitchers, with the dolines loc ally commix to form uvulas in the Stettin Formation movements and surface water erosion, forming a typically dissected terrain, this is the Lluidas Vale polje which is developed within a down faulted block of Tertiary white limestone and it has a strong structural control through with(predicate) NW-SE trending faults. The down of the vale also appears to be structurally controlled in that a series of down-faulted limestone blocks are present and overlain by a sequence of limestone rubble, bauxitic solid grounds and alluvium which extends to over 30 m thickness.Lluidas Vale is a Rand- or B parliamentary procedure-Polje in that it is not surrounded on all sides by limestone but bordered to the south by volcanic and clastic sedimentary strata of the primaeval Inliers in the Juan de Bolas Mountains. The latter is the source of the Rio Cobre and Murmuring Brook which flow northward towards the vale. The Rio Cobre flows north through the centre of the vale, but turns abruptly south eastward and flows a short distance along the fault scarp beforehand sinking. In the polje, the river and Murmuring Brook are both ephemeral streams flowing only after rainfall. The north and northwest border of the vale is attach by well developed cockpit karst. A number of small alluvial fans occur on this part of the vale in heavy dust soils representing the residue of limestone dissolution. practically lighter alluvial soils occur on the east and southern part of the vale due to more frequent flooding. The western sandwich margin of the vale is marked by a less launch slope containing dolines and small conic hills grading to tower karsts towards the polje. in that respect were also caves in the area containing stalactites, stalagmites and newspaper columns. A stalagmite is an icicle like deposit of calcium carbonate which rises from the floor of a cave. A stalactite is another icicle like deposit of calcium carbonate hanging from the caves roof or growing downward. A pill ar is a slender vertical structure of stone used as a support or for ornament. These features can be seen a plot 1.2. The landforms occurred on a west-facing fault scarp above Lluidas Vale polje. The area was also covered with shrubs and cancel vegetation mainly closer to the slope.Stop 4 Ty DixonDuring our stop at Ty Dixon where tower karsts, the name given to all landforms in areas of limestone, and dolines were evident. A doline is a funnel shaped or conical shaped solution hollow which is formed when several shallow holes unite. There seemed to be an eroded alpine that left a residual hill forming tower karsts and dolines. The tower karsts seemed approximately 40m tall. A tower karst is isolated steep sided residual hills. At the base at the end of the residual hills, thither were shallow caves which were generally covered with shrubs and natural vegetation. The vegetation of the area was courtly on the flat areas, where irrigation and accessibility is better, of mainly s ugar cane plot of ground in other areas, like on the tower karsts there were natural vegetation.Stop 5 MoneagueMoneague was erst one of the largest and most important towns in St. Ann, due to its convenient location along the main North to South. The Moneague Ponds was once located on a flood plain. While at this location houses were visible within close proximity of the ponds. junk such as trees, trunks and barks could be seen in the pond. The soil was heavily saturated with water (waterlogged) and appeared darkened in color. The water in the pond, however was light blue(a) and fairly clear. There was natural vegetation surrounding the pond, this is evident in plates 5.0 and 5.1Plate 5.0 (Moneague Ponds)Plate 5.1 (Lush natural vegetation surrounding the ponds)Effect of LimestoneLimestone contacts the surround as it induces highly alkaline dusts which are air pollutants. It also has cause on health, in particular for those with respiratory problems. The dust also has physical effects on the surrounding plants, like it blocks and damages their internal structures and slit of leaves and cuticles, as well as chemical effects which may affect long-term survival.Benefit of LimestoneAs it has its effects, limestone also has its benefits. Adding limestone to water in order to neutralize it is known as liming. When limestone is added to ponds and lakes, it has the effect of adding calcium and protecting the water from becoming too acidic. The benefit of limestone in this situation is that it restores and helps to maintain the bionomics of the water and makes it supportive of aquatic life. It is also an inexpensive method of slow down down acidification. ConclusionIn conclusion to my studies, I have set the features of limestone in the areas of study. Our first stop was along the Bog Walk Gorge, where the rocks calmness was mainly of pure limestone. Chemical weathering was acting upon the rocks resulting in faster depravation and the formation of clints and grykes. At our second stop, the Bog Walk Bridge, located in the Pleasant Hill community, it was observed that the community bridge was under oxidation. A flood warning system was also visible, suggesting that flooding is a threat to this community. Our stop at Lluidas Vale, Worthy Park in St. Catherine, was the most enlightening one. Here we observed a sink hole formed by a tributary, As well as a polje in Troy formation. To the South and South westernmost of the vale, rocks of the Yellow Limestone Group crop out, while further south older cretaceous volcanic and sedimentary strata are exposed.In Lluidas Vale processes are dominated by mass is a plateau area that has been severely eroded so that the relief is sharp. The floor of the vale also appears to be structurally controlled. The North and North West border of the vale is marked by well developed cockpit karsts. Much lighter alluvial soils occur on the eastern and southern parts of the vale due to more frequent flooding. The western margin of the vale is marked by a less steep slope containing dolines and small conical hills grading to tower karsts towards the polje. There were also caves in the area containing stalactites, stalagmites and pillars. During our stop at Ty Dixon where tower karsts and dolines were evident, there seemed to be an eroded highland that left a residual hill forming tower karsts and dolines. We also came crosswise the Moneague Ponds, which was once a flood plain and is now heavily waterlogged. Debris could be seen in the light blue color pond the soil was heavily waterlogged and appeared darkened in color.Bibliographyhttp//www.discoverjamaica.com/gleaner/discover/geography/features.htm Holmes, D. and Warn, S. (2003) Fieldwork Investigations- A Self Study melt down, London Hodder and Stoughton, 2000.(1991) The Longman Atlas for Caribbean Examinations, London Longman Caribbean.Allen-Vassell, M., Fraser, L. (1993). A Guide to Field Studies in School-based Assessment for CXC Ge ography.Caribbean Publishers