BEGIN:VCALENDAR VERSION:2.0 METHOD:PUBLISH PRODID:-//Missouri State University/Calendar of Events//EN CALSCALE:GREGORIAN X-WR-TIMEZONE:America/Chicago BEGIN:VTIMEZONE TZID:America/Chicago BEGIN:DAYLIGHT TZOFFSETFROM:-0600 TZOFFSETTO:-0500 DTSTART:20070311T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU TZNAME:CDT END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0500 TZOFFSETTO:-0600 DTSTART:20071104T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU TZNAME:CST END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:d65d3cb4-9968-469d-af22-9ab58ff6644e.234509@calendar.missouristate.edu CREATED:20240229T144712Z LAST-MODIFIED:20240229T144712Z LOCATION:Roy Blunt Hall 345 SUMMARY:SEES Seminar: "The Okavango Rift in Botswana" DESCRIPTION:The Okavango Rift (OR) in Botswana is part of the southwestern extension of the more mature East African Rift System. The OR is the you ngest part of the East African Rift System and is currently at the beginn ing stages of becoming a continental rift. Thus\, there have been numerou s questions if the OR is actually a contenental rift. There are no surfac e volcanic rocks\, limited evidence of extension and no plateau uplift. T o aid in determining if the OR is an active rift\, a series of geophysica l experiments have been conducted to study the lithospheric structure of the OR. These studies include active and passive seismic\, gravity\, magn etics and magnetotellurics. The studies have shown that underneath the OR \, the lithosphere and asthenosphere display the classic signatures of a continental rift including: thinned crust\, lower density and seismic vel ocities. Higher electrical conductivities in the lithosphere indicate a r ising warm asthenosphere. Additionally\, a magnetic analysis indicated th at the Curie Isothermal depths are elevated\, again agreeing with the oth er geophysical results. Thus\, the OR is considered to be in the initial stages of continental rift evolution. The future extension will create ri ft-related grabens and magmatic activity will reach the surface.\n\n\nDr. Kevin Mickus\, distinguished professor of geology at Missouri State Univ ersity specializes in geophysical methods. He studies Earth's tectonic en vironment to explore for water\, mineral and geothremal resources. X-ALT-DESC;FMTTYPE=text/html:<html><head><title></title></head><body><p>Th e Okavango Rift (OR) in Botswana is part of the southwestern extension of the more mature East African Rift System. The OR is the youngest part of the East African Rift System and is currently at the beginning stages of becoming a continental rift. Thus\, there have been numerous questions i f the OR is actually a contenental rift. There are no surface volcanic ro cks\, limited evidence of extension and no plateau uplift. To aid in dete rmining if the OR is an active rift\, a series of geophysical experiments have been conducted to study the lithospheric structure of the OR. These studies include active and passive seismic\, gravity\, magnetics and mag netotellurics. The studies have shown that underneath the OR\, the lithos phere and asthenosphere display the classic signatures of a continental r ift including: thinned crust\, lower density and seismic velocities. High er electrical conductivities in the lithosphere indicate a rising warm as thenosphere. Additionally\, a magnetic analysis indicated that the Curie Isothermal depths are elevated\, again agreeing with the other geophysica l results. Thus\, the OR is considered to be in the initial stages of con tinental rift evolution. The future extension will create rift-related gr abens and magmatic activity will reach the surface.</p>\n<p><a href="http s://people.missouristate.edu/kevinmickus/">Dr. Kevin Mickus</a>\, <a href ="https://search.missouristate.edu/people/kevinmickus">distinguished prof essor</a> of geology at Missouri State University specializes in geophysi cal methods. He studies Earth's tectonic environment to explore for water \, mineral and geothremal resources.</p></body></html> DTSTART;TZID=America/Chicago:20240426T143000 DTEND;TZID=America/Chicago:20240426T153000 SEQUENCE:0 URL:http://www.geosciences.missouristate.edu CATEGORIES:Public,Alumni,Current Students,Faculty,Future Students END:VEVENT END:VCALENDAR