Science 1102 Earth's Crust.ppt

Science 1102 Earth's Crust.ppt - Earth's Layered Structure...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Click to edit Master subtitle style Earth’s Layered Structure Please note:  This file is intended  solely for your individual use, and  any form of copying, distribution,  or public presentation is not  permitted without the express  written permission of the author.  
Background image of page 1

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

View Full DocumentRight Arrow Icon
How do we know what’s inside? Drilling n Wells drilled into Earth are mostly in the upper  7 km of the crust  n Deepest well = Soviet (Russian) well in  northern Kola Peninsula  (The Kola Superdeep Borehole ~ “SG-3” ) n 24 year effort to drill a 12 km (12,000 m) hole,  starting in 1970.  History: 5 years to drill 7 km; 9 years to drill  the next 5 km; got stuck at 12 km in 1989. Later drilling re-started, and by 1994 had  reached  12,262 m (7.6 miles deep) , the  deepest  hole ever drilled. This is about a third of the way through the  crust in that region. The rocks at the bottom are 2.7 billion years  old. Target depth was 15 km (15,000 m). Costs were more than $100 million. Above:  The drill rig enclosure, over 200 feet tall Below:  Core samples from 6 km beneath the surface
Background image of page 2
How do we know what’s inside? Drilling n Deepest U.S. well  was a gas well drilled in Oklahoma (the GHK/Lone  Star Bertha Rogers #1-27 well). Drilling starting in 1974 and stopped  at 31,441 ft ( 9,583 m or 9.58 km ) when it struck molten sulfur.  n The second deepest U.S. well was the Lone Star/GHK #1-28 E.R.  Baden well (total depth 30,050 feet). Drilling started in 1970 and  ended in 1972. Both of these two deepest U.S. wells are in the Anadarko Basin, an 
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/23/2011 for the course SCI 1102 taught by Professor Alme during the Spring '07 term at Kennesaw.

Page1 / 18

Science 1102 Earth's Crust.ppt - Earth's Layered Structure...

This preview shows document pages 1 - 4. Sign up to view the full document.

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