PPT-COASTLINES Barrier Islands

T wo of the most important features along the coastlines of opening oceans are wetlands and barrier islands The barrier islands are sand islands that were created following the last Ice Age as water was removed from the oceans to create the icecaps that covered most of the Northern Hemisphere As sea level dropped the shoreline retreated spreading a layer of sand over the surface of the continental shelf When the ice melted rising sea level produced an advancing shoreline that transgressed the previously deposited layer of sand Waves particularly during storms heaped the sand into ridges that eventually built above sea level creating barrier islands Initially barrier islands were separated from the land by a lagoon Over time the lagoon eventually filled with sediment derived from the land and sand brought in through tidal inlets As the lagoons infilled wetlands were created and eventually occupied by the bottom units of the marine food web Barrier islands are temporary constructs constantly moving landward. Gambier Islands Fr Marquesas Islands Fr French Polynesia Fr St Martin Fr Neth Martinique Fr Bonaire Cura57575ao Aruba St Eustatius Ne h Saba Neth French Guiana Fr St Pierre and Miquelon Fr Puerto Rico U S A Jammu and Ka Barrier Islands. . T. wo of the most important features along the coastlines of opening oceans are wetlands and barrier islands. The barrier islands are sand islands that were created following the last Ice Age as water was removed from the oceans to create the icecaps that covered most of the Northern Hemisphere. As sea level dropped the shoreline retreated spreading a layer of sand over the surface of the continental shelf. When the ice melted rising sea level produced an advancing shoreline that transgressed the previously deposited layer of sand. Waves, particularly during storms, heaped the sand into ridges that eventually built above sea level creating barrier islands. Initially, barrier islands were separated from the land by a lagoon. Over time, the lagoon eventually filled with sediment derived from the land and sand brought in through tidal inlets. As the lagoons in-filled, wetlands were created and eventually occupied by the bottom units of the marine food web. Barrier islands are temporary constructs constantly moving landward.. SS8G1c. The Fall Line. The fall line is a natural boundary that separates the Piedmont and the Coastal plain regions.. Due to the drop-off of the hilly Piedmont region into the flat Coastal Plain, the waterfalls . 12 These barrier islands retreated or migrated north - ward as the ocean continued rising. There is some debate about how the barriers actually moved. Some research suggests that the barriers slow Agenda. : . (Write in agenda.) Get Syllabus signed.. . Review the regions power point and preview the power point for tomorrow.. . EQ. : How has climate played a role in development? (G1c. ). WU. c. . Relate the role of technology and human intervention in the control of constructive and destructive processes.. S5E1. Students will identify surface features of the Earth caused by constructive and destructive processes.. Aim: To understand how geological structures produce different types of coastlines. To know the difference between diverging and converging waves. Specification content. As we have already learnt, . Select the ‘Ocean’ box and all sub-categories. Google Earth Tour of…. Monterey Bay, the Great Barrier Reef, atolls, the Caribbean, Hawaii, and Cape Cod. Use Google Earth to tour each of the above locations. Aim: . To know the outline of this topic and to complete the introduction tasks. Sub topics across this option. Enquiry Q1:Coastal processes. Enquiry Q2:Landforms and landscapes. Enquiry Q3:Coastal risks. Aim: We must know and understand the following:. What do they look like? What factors influence their formation?. What is coastal erosion?. Specification content. Starter – . High and low energy coastlines. (Write in agenda.) Get Syllabus signed.. . Review the regions power point and preview the power point for tomorrow.. . EQ. : How has climate played a role in development? (G1c. ). WU. : . (Write answer in your notes.). Prepared byGretchen RaschShaarina Boydand Suzanne Clegg for theThreatened Species UnitApril 1996 Department of ConservationISSN 1170-3806ISBN 0-478-01709-6Cover photo CR Veitch Department of Conservat subenvironments. Beach and . shoreface. Lagoon and/or tidal flat. Tidal . inlet and . tidal deltas. Development and morphology of barrier islands depends . on coastal . gradient (usually form on shallow slopes. Geographic Location. A narrow elongated beach situated parallel to the shoreline. .. Padre Island. Louisiana Barrier Islands (Contains the Barrier Beach biome). Georgia Barrier Island (Contains the Barrier Beach biome).