1 Attendance 2 Notes at 9:28 3 Finish Lab#39 at 9:40 Wednesday, March 28 1 Attendance 2 Notes at 9:28 3 Finish Lab#39 at 9:40

Lithosphere-the rock layer on Earth

One evidence of Earth Movement Earthquakes

Types of Faults Normal – numerator side slides down Reverse – numerator side pushes up Transform – side by side Types of Faults

Normal Fault

Reverse Fault

Transform Fault – side by side

Benchmark

Tilted Strata

Folded Strata

Tectonic Plates

Volcanoes

DD make CC which make PT

The Earth has a dynamic geologic system. What does that mean? The geology is always changing.

asthenosphere The part of the Earth’s interior that acts like plastic is called the _________________

How fast to the plates move? Between 1 – 18 cm per year. How fast to the plates move?

Mid-Ocean Ridges Image: A diver swims between the Eurasian and North American plates in Thingvellir lake, Thingvellir National Park, Iceland. Iceland is one place where a mid-ocean ridge can be seen on land and in shallow waters.(credit: Wild Wonders of Europe/Lundgre) http://www.bing.com/images/search?q=mid+ocean+ridges&view=detail&id=54660F4F2A5204CA0C9D8697B0AA2DC40883052F&first=0&FORM=IDFRIR&adlt=strict

Rifts – where the crust is breaking apart. In Ethiopia in north east Africa something exciting is happening. In 2005, in the middle of the Afar desert, a crack opened and grew by 8 metres over 10 days. The gap filled with 2.5 cubic kilometres of molten rock - enough to fill the new Wembley stadium a staggering 1000 times! Since then the crack has been growing wider and longer. Scientists believe that a new ocean is slowly forming and will eventually split the African continent in two. This has happened because of volcanic eruptions, and the earthquakes that have been triggered by these eruptions. The Afar desert is the only place in the world where we can see tectonic plates growing apart at the Earth's surface

- deep spots in the ocean Trenches

Where the tectonic plates are pushing back down into the earth. Subduction

Islands that were made because of subduction Island Arcs

Places where melted rock is rising in the middle of a plate. Hot spots

Magnetic patterns in the mid-ocean ridges Proves sea floor spreading because of plate tectonics. Magnetic patterns in the mid-ocean ridges

Age patterns in the mid-ocean ridge Proves that sea floor spreading is happening because of plate tectonics. Age patterns in the mid-ocean ridge

Age of Oceanic Crust