PORT TOWNSEND — Trevor Contreras will present “The Geology and Art of Stone Carving” at 4 p.m. Saturday.
The free online lecture is sponsored by the Quimper Geologic Society.
Contreras will discuss the use of Washington rocks, to include basalt, dunite, jade and glacial erratics, in sculpture and discuss the geological settings that produced these stones.
Contreras is an engineering geologist with the landslide hazards program at the Washington Geological Survey.
For more information or a link to the lecture, visit www.quimpergeology.org.