Q: How big is the dredge and how many rocks can it collect? The Dredge:
A: The dredge is actually made up mostly from chain, all inter-linked together. The front or mouth of the dredge is a metal casting that is about 1 meter wide and a half meter across. Each corner connects to a chain that is designed so that two sides will break if it snags on a big rock.
The dredge holds a lot of rocks because the chain bag that is attached to the mouth is as tall as a person. Our record for this cruise so far is collecting 500kg (over 700 pounds) of rocks on one dredge! That is a few hundred rocks of various sizes!
Look at the blog for our first days; there are some dredge pictures there...
Student Resources:
Science Challenge Questions in Hard-copy format (Word.doc)
Online Science Challenge 1 Online Science Challenge 2 Online Science Challenge 3 Online Science Challenge 4
Student Questions and Answers from Scientists:
Is it Difficult to be at Sea for Two Months?
How big is the dredge & how many rocks do we collect when we dredge?
Do Sharks Attack Your Seismic Floats?
What Are We Doing on July 4th in the Indian Ocean?
Ship Speed: How Fast are we traveling at sea?
Where are the Real-time Web-Cameras on the RV Roger Revelle?
Expedition Background Articles:
Hotspots and Ninetyeast Ridge: What’s a hotspot?, by Will Sager
Anatomy of a Seamount Survey, by Will Sager
Dredging Operations onboard the R/V Revelle, by Amy Eisin
Geochemistry of Volcanic Rocks, by Fred Frey
Cool Expedition Discoveries Already!, by Will Sager
What is Bathymetry?, by Will Sager
Acoustics: Substitute for Superman Vision?, by Will Sager
Magnetometers (“Maggie”) and Attracting Sharks, by Rory Wilson
High.Seas.HIGHTECH/ analyze!ocean@voyages, by lots of us...
How to Become a Captain, by the Captain
The Search for the Indo-Pacific Humpback Dolphin, by Leslie Nemazi.
Rocks Rock! (or ) The Fresh Cut Surface of Beautiful Ocean Rock, by Evelyn Mervine
Exploring the Bridge of the RV Roger Revelle
Teacher Resources:
Sample Student Responses to the Navigation Challenge Question (Word.doc)
CCTM PowerPoint presentation: An Introduction to the Sea90e Expedition
The Official NER Science Cruise Report including Educational Outreach
