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USGS Coastal and Marine Geology Program

Field Activity Details for field activity 2017-625-FA

AKA: Puerto Rico geochemistry

Other ID: none

Status: Completed

Organization(s): USGS, Pacific Coastal and Marine Science Center

Funding Program(s): Past, Present and Future Coral Reefs (ZP00FRV)

Principal Investigator(s): Renee Takesue

Affiliate Investigator(s): Dr. Aaron Reyes, Westfield University, Massachusetts

Information Specialist(s): Renee Takesue

Data Type(s): Location-Elevation: Navigation, Sampling: Geology

Scientific Purpose/Goals: Collect stream sediment samples and nearshore samples in southern Puerto Rico and Guanica Bay

Vehicle(s): None

Start Port/Location: Guanica, Puerto Rico

End Port/Location: Guanica, Puerto Rico

Start Date: 2017-06-18

End Date: 2017-06-24

Equipment Used: Hand-grab sample, Handheld GPS

Information to be Derived: Geochemical compositional data, strontium isotope ratios, sediment grain size distribution, organic carbon content, stable carbon isotope ratio

Summary of Activity and Data Gathered: Collected 63 sediment samples and 21 bedrock samples.


Affiliate Staff:

Notes: 51 stream sediment samples collected on foot. 12 Marine samples collected from the University of Puerto Rico at Mayaguez, Magueyes Marine Lab 20-foot whaler.


Southern Puerto Rico

North: 18.12546007 South: 17.92813381 West: -66.96716309 East: -66.01285129



Takesue, R.K., 2019, Geochemical and isotopic compositions of stream sediment, parent rock, and nearshore sediment from southwest Puerto Rico, April 2017-June 2018: U.S. Geological Survey data release, URL:


Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
Hand-grab sample --- Biology
Handheld GPS --- Navigation

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