---

Activity

2013

• 40AR/39AR AGES FOR ANDESITES OF THE GUARACANAL FORMATION, PUERTO RICO
  26 New Insights into Old Arcs: Petrology, Geochemistry, and Tectonics of Island Arcs
  Thursday, 21 March 2013

  8:00 AM - 12:00 PM

  Conference Room 6–7
• 40AR/39AR AGES FOR INTRUSIVE ROCKS OF ST. CROIX
  26 New Insights into Old Arcs: Petrology, Geochemistry, and Tectonics of Island Arcs
  Thursday, 21 March 2013

  8:00 AM - 12:00 PM

  Conference Room 6–7

---

2008

• Geochemical and Tectonic Evolution of Albian to Eocene Volcanic Strata In the Virgin Islands and Eastern and Central Puerto Rico
  T128 Late Jurassic to Recent Geodynamic Evolution of the Caribbean Region
  Sunday, 5 October 2008

  8:00 AM - 12:00 PM

---

2001

• GEOLOGIC EVOLUTION OF PROTEROZOIC ROCKS, EASTERN AND SOUTHERN MIDCONTINENT OF UNITED STATES
  T36 The Proterozoic of the Eastern Midcontinent and Beyond
  Monday, 5 November 2001

  1:30 PM - 5:30 PM
• DIABASE DIKES, EASTERN ARBUCKLE MOUNTAINS, OKLAHOMA: TWO MAGMATIC SUITES AND REGIONAL IMPLICATIONS
  12 Probing the Precambrian in the Midwest: Reconciling Geological, Geochemical and Geophysical Observations-II
  Monday, 23 April 2001

  1:20 PM - 4:40 PM

---

Date Unknown

• CARIBBEAN PLATE BOUNDARIES—EOCENE SUBDUCTION, COLLISION AND SUTURING IN PUERTO RICO: SIGNIFICANCE OF THE GREAT SOUTHERN PUERTO RICO FAULT ZONE
  T111 Focus on IGCP: Modern and Ancient Plate Boundaries and Orogens (Posters): In Memory of Chris McA. Powell