The “Hole” Story about Ocean Cores

Lab groups can work together to examine high resolution photos and data from four cores taken at various depths in this first-of-its-kind complete section of oceanic crust. This poster includes background information and five classroom activities on the back.

Chile Triple Junction (ODP 141)

Faulted claystone, silty claystone, sandy silty claystone from late Pleistocene subunit IIC recovered from hole B at Site 863. This site is located at the base of the trench slope of the Chile Trench where the Chile Ridge is being subducted. One of the objectives at this site was to identify the structural fabrics and deformations caused by rift subduction. Site 863 drilling was designed to address the following structural problem: To analyze the deformation…

Fault Core: 141 Triple Junction Core Kit

Faulted claystone, silty claystone, sandy silty claystone from late Pleistocene subunit IIC recovered from hole B at Site 863.  This site is located at the base of the trench slope of the Chile Trench where the Chile Ridge is being subducted.  One of the objectives of drilling at this site was to identify the structural fabrics and deformation caused by rift subduction.

Why study forams?

Foraminifera allow scientists to look at the past and compare it to today’s world to see how the Earth has changed over time. Scientists gain a better understanding of the Earth by looking at the distribution of foraminifera. Liv- ing forams are like mirrors on present-day condi- tions, while fossil foraminifers provide clues to past environments and how the surface of the Earth has changed over time. There are over 4000 extant (living) foram species today,…