Marine Geoscience Data System

GeoMapApp

Pacific-Antarctic Movie Credits

     This movie was presented at the fall 1993 AGU Meeting in San Francisco. It was created in Micromind Director on a Macintosh II with 8-bit color, and 10 mbytes of RAM, System 7, and Quicktime. It shows 10 million years of seafloor spreading of the axis of the Pacific-Antarctic Ridge in 50,000-year steps. The actually spreading rate is about 30 mm/year. A CD-ROM of the full movie is expected by mid-May, 1994. It will run on a Macintosh and comes with its own own projector. For inquires concerning the CD-ROM send e-mail to info@marine-geo.org

     Five exerpts from the movie are available in mpeg and quicktime formats which can be seen on any computer if you have either a mpeg or Quicktime player. The bathymetry movies show the seafloor spreading of the surface topography. White represents the shallowest depths, dark blue the deepest depths. The topography is corrected for the thermal contraction of the lithosphere. The divergent plate boundary is offset by the Pitman Fracture Zone, a right lateral transform fault. The magnetic movies show the seafloor spreading of the magnetized oceanic crust. Orange-red indicates positive anomalies or normally magnetized crust, blue represents negative anomalies, or reversely magnetized crust. Note the symmetry in the magnetic anomalies about the ridge axis. The number in the upper left corner of each frame of the movies represents the age of the ridge axis in millions of years.