GeoSep Services (GSS) is a locally owned small business, staffed by a small group of loyal employees. We are dedicated to providing high-quality mineral separations along with apatite and zircon fission track+UPb analyses to support the international geochronology/thermochronology community.
GSS is located in Moscow, Idaho, within the beautiful Palouse region of Idaho and Washington, USA.
We celebrated ten years of operation in January 2025!! See 10-year update.
We specialize in apatite fission track (AFT) analysis, zircon fission track (ZFT) analysis, zircon UPb, and mineral separations.
Update April 2026:
GSS is ready to help with your chronology research! Contact us to check if our turnaround times are currently faster than usual. Now is a great time to send GSS your samples! Please contact Paul or Jim with questions.
Thank you to all our clients and colleagues for your support.
Note: for an additional fee of $100, we can provide pyrite (sulfide) removal/cleanup of zircon fractions (DIM sink) if requested.
(See Services)
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Current, upcoming, and prior events:
We will attend the Geological Society of America (GSA) annual GSA Connects meeting (Denver, CO, October 2026; no booth).
GSS attended prior annual Geological Society of America (GSA) Connects meetings. Most recent: Anaheim in September 2024; Pittsburgh in October 2023; Denver in October 2022; Portland in October 2021.
GSS attended prior Thermo meetings. Most recent: September 2023 in Riva del Garda, Italy; Thermo"2020" in Santa Fe, NM in September 2021 (thermo2021.us).
We appreciate these opportunities to meet our current and prospective clients and colleagues, and to support advancements in the geochronology/thermochronology community.
Check out our photos from some of our conference/meeting trips.
See some GSS conference duck, hat, and string bag adventures!
Note: If you have concerns about our website or any links, please contact the webmaster.