{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

120117a-Bathymetry-StartR

# 120117a-Bathymetry-StartR - BATHYMETRY Observations(facts...

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

1/19/12 1 BATHYMETRY Observations (facts) Patterns Synthesis Hypotheses or Theory (explanation grounded in data and patterns of data) Understand what methods were used historically and are used today to make observations about the bathymetry of the oceans Examine the patterns of ocean bathymetry Understand the connections between ocean bathymetry, the origin of ocean basins, and the theory of plate tectonics Goals and Objectives Understand what methods were used historically and are used today to make observations about the bathymetry of the oceans Examine the patterns of ocean bathymetry Understand the connections between ocean bathymetry, the origin of ocean basins, and the theory of plate tectonics Goals and Objectives As new data emerges, new patterns might emerge, and new syntheses and explanations might emerge. It took centuries to develop a map of ± the earth ² Garrison, 2008 Coordinate system - but not numeric Elevations of Earth above sea level: ( ± topography ² )

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

View Full Document
1/19/12 2 To make a bathymetric (or topograhic) map, need to know: 1. Depth (or elevation) relative to sea level 2. Location on Earth Eye level - relative elevation (elevation change) eye height stadia height Use multiple measurements to measure changes over longer lateral or vertical distance. Using the Eye Level Surveying Equipment 1. ± level ² on a tripod 2. tape measure (horizontal) 3. stadia rod (vertical) http://www.marinebio.net/ marinescience/01intro/ tomeas.htm Sophisticated eye-level on a tripod. Photo by: Mark R. Boardman
1/19/12 3 Sophisticated eye level, stadia rod, measuring tape. Person in stream is part of a second measuring team. Photo by: Mark R. Boardman This survey mark, first set in 1917, is a bench mark, meaning it marks a point whose elevation above or below a geodetic vertical datum is known. Bench marks are just one type of survey mark set by the National Geodetic Survey and its predecessor organizations. celebrating200years.noaa.go

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern