Works Of The Sea And Development Of The Related Landforms For Presentation

Work of the sea and development of the related landform Parin Shah LA 8808

Ocean waters ,[object Object],[object Object],[object Object],Distribution of land and water over the Earth’s surface. I. Continental Hemisphere II. Oceanic Hemisphere

[object Object],[object Object],[object Object],Ocean currents

[object Object],[object Object],[object Object],[object Object],A schematic showing the ocean "conveyor belt", where surface waters sink, enter deep water circulation, then resurface after slowly flowing through the deep ocean.

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Relationship of the moon and sun to the earth during Spring tides Relationship of the moon and sun to the earth during Neap tides

Waves Wave Measurements ,[object Object],Characteristics of a wave ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Image showing example of waves of oscillation Formation of a Tsunami wave

[object Object],[object Object],[object Object],Movement of water particles with the passage of a wave Changes that occur when wave moves onto shore

[object Object],[object Object],[object Object],[object Object],Wave refraction along an irregular shoreline.

Wave refraction Wave refraction at Sitges, Barcelona The impact of the rock islets at Sitges: refraction has led to beach erosion

[object Object],[object Object],[object Object],[object Object],[object Object],Beach drift, caused by the upbrush of water from oblique waves.

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[object Object],[object Object],[object Object],Wave cut plat-form and sea cliff Wave cut notch and platform, Old Red Sandstone

[object Object],Wave cut platform

Wave-cut platform, a geological feature caused by the sea's erosion of cliffs, seen atSoutherndown, near Bridgend, South Wales.

[object Object],[object Object],[object Object],The Cannon blowhole south of Esha lighthouse is unusual in that in high seas water is blown out sideways from the cliff with a loud report.

[object Object],[object Object],[object Object],Minor erosional features along a rocky coast, seen at low tide. Surf hollows out sea cave in more erodible part of bedrock. Cave through headland becomes a sea arch. Surf tears away parts of bedrock, leaving isolated stack as an ‘island’ on wave-cut platform.

Examples of sea-arch Olympic peninsula, pacific ocean, cape flattery makah-indian reservation sea caves

Sea arches. Rising sea level is cutting deeply into the sandstone bedrock, etching crevices and arches along weaknesses caused by fractures. The parallel layers of strata and crosscutting fractures are visible. Anse de l'Est, Ile aux Loups, Iles de la Madeleine, Quebec

The outer coast of Shetland includes long sections of spectacular cliff coastline. The form of cliffs is intimately related to rock type and structure, together with the more muted influence of past processes, including glaciation and sea level history.

Sea arch at Hawaii's Volcano National Park, on the Big Island of Hawaii made of igneous rock (basalt), formed by lava from the Kilauea Volcano and the sculpting power of the Pacific Ocean. Sea arch

Apostle Islands sea arch Australia’s Nullarbor plain ends abrutly in limestone cliffs. Rocks pounded today by ocean were laid down on the sea floor 20 million years ago.

The Old Man of Hoy, Orkney isles, Scottland. A stack of Old Red Sandstone, 137mt. High rising from the platform of Devonian lava.

Twelve apostles, Southern Australia, have been carved by thrusting waves and searing winds.

Padestal of calcareous sandstone supported by an undercut pillar of shale on the fore shore at Sheepstone, Yorkshire In the bay of Fundy, Nova Scotia, the tide falls 45ft. Exposing rocks eroded by the water.

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Shoreline features ,[object Object],[object Object],[object Object],[object Object],[object Object],Development of a hooked spit by the refraction of oblique waves Notsuke Hooked Spit, Hokkaido, Japan

Spits Examples of Spit Spurn Head, built by beach drifting in to the estuary of the Humber, in continuation of the Holderness coast, Humberside, England.

Spits Hooked spit, New Zealand

[object Object],[object Object],River Yare, Norfolk, England Spits River Alde, Suffolk, England Examples of river deflection in East Anglia by the southerly extension of sand and shingle spits.

[object Object],[object Object],[object Object],[object Object],Tombolo Stockton Island Ashland County

[object Object],[object Object],[object Object],Baymouth barrier, Grand Beach, Lake Winnipeg, Manitoba

Baymouth bar A spit north of Gdansk and two smoothly curved bay-mouth bars enclosing broad lagoons along the south-east Baltic coast of Poland and Lithuania.

[object Object],[object Object],[object Object],[object Object],Barrier island, cross section

Offshore bars and barrier islands Offshore bars and barrier islands with lagoons, along the coast of North Carolina, USA Offshore bars and barrier islands

When waves break against headlands most of their energy dissipates. Therefore the waves inside adjacent bays have lower energy and as a result sediments are deposited in the bays. As headlands erode and bays fill with sediment, an irregular coastline eventually becomes smooth . Development of the Coast-line Development of the Coast-line

[object Object],[object Object],Emergent coasts Classification of coast An emerging coast due to post-glacial isostatic uplift, Finland

[object Object],[object Object],[object Object],Submergent coasts Submerging edge of preglacial erosion surface, near New Richmond, Quebec The gently tilted land surface, seen here extending under the sea, along the north coast of Baie des Chaleurs, is an ancient landscape that was created by erosion across the soft rock in the region. This preglacial erosional surface postdates an older erosion surface, which was uplifted, tilted, and eroded, leaving sooth summits of resistant, igneous rock. The juxtaposition of these two ancient landscapes gives Gaspesie a bilevel terrain.

A celebrated coast of submergence: Rio de Janeiro, Barzil Submergent coasts

[object Object],[object Object],[object Object],[object Object],Submerged Atlantic or transverse cost. Old red sandstone crops out along anticlines which have remained as uplands or broad ridges that jut out as promontories. Less resistant Carboniferous strata outcrop as synclines in the valleys, which pass seawards into long bays or rias, south-west Eire.

Submerged ‘Pacific’ or longitudinal coast (Dalmatian type), Yugoslavia ,[object Object],[object Object]

Works Of The Sea And Development Of The Related Landforms For Presentation

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