Glacier+and+Erosion+Claymation+Script


 * A long, long time ago glaciers moved over the land that is now the Boston Harbor islands
 * It went along picking up rock, clay, boulders and more, known now as till
 * After a while, it dropped that till making a drumlin.

Drowned Drumlin Kettle Lake Erratic Moraine
 * If a glacier got stuck between two drumlins, it would then melt and make a drowned drumlin
 * When a glacier dropped chunks of ice, they stayed and eventually melting forming today’s kettle ponds
 * When a glacier drops a really big rock, its called an erratic
 * When the glaciers stopped moving south it started melting and all the till it was pushing formed a ridge of till, a moraine

The glaciers left drumlins in the boston area and the drumlins are now the Boston Harbor Islands. Everyday they are getting eroded by wind, rain, and waves.
 * Erosion by Waves
 * Waves crash on the shore and the pressure can crack rock, that’s impact
 * Another way the waves erode is with abrasion, abrasion is when the sediments in the powerful waves crash on rock and scratch.
 * If a wave slows down all of the sediments it was carrying drop
 * Beaches are made from sediments washed up onto the shore by the waves
 * Longshore drift happens when the sediments get pulled down the beach by waves
 * A spit is made from longshore drift, it is a long and narrow piece of land that goes out into the water
 * Erosion by Wind
 * When the wind blows it erodes drumlins. The little particles it blows into the air are called loess, they then drop and make a pile of loess.
 * Erosion by Water
 * When it rains, all the extra water flows off the drumlin and is called runoff
 * As the runoff flows down, it makes little grooves in the soil called rills
 * The more runoff there is the bigger the rills are, once they get bigger they are called gullies not rills.
 * So, glaciers and erosion made the Boston Harbor Islands

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