Lecture 3 Jan 23 2008

Lecture 3 Jan 23 2008 - Small quake reported at Mount St....

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Small quake reported at Mount St. Helens 1/18/2008 VANCOUVER, Wash. (AP) - Steam seeping from a fracture atop the lava dome in Mount St. Helens' crater and the mountain's first noteworthy seismic activity since 2004 have caught scientists' attention this week as signs that something is moving inside it. While the likelihood of a major eruption seemed low, scientists have quit venturing into the volcano's crater and are checking the monitoring equipment along St. Helens' flanks. A magnitude 2.9 earthquake and was followed by a second quake of magnitude 2.7. Tiltmeters also registered alternate ground swelling and deflation near the lava dome. All are typical signs that magma, superheated gases, or both are moving through conduits beneath St. Helens. http://www.wnbc.com/news/15084253/detail.html
Background image of page 2
Earth is differentiated into layers that have different physical and chemical properties. We seek to understand the materials and processes of Earth. Next we focus on rocks and minerals.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The differentiation of early Earth resulted in the chemical composition of the crust on which we live being different from the Earth as a whole.
Background image of page 4
Minerals -- the building blocks of rocks naturally occurring - not made by humans solid - not liquid or gas crystalline substances - regular internal arrangement of atoms, repeating in an
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 25

Lecture 3 Jan 23 2008 - Small quake reported at Mount St....

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online