Earthquake Topics — Trenching
![](https://webarchive.library.unt.edu/eot2008/20080916064128im_/http://earthquake.usgs.gov/learning/images/topics/trench.jpg)
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Organization | Topics | Content Types | Level |
Earthquake Science Explained — A series of short articles for students, teachers, and parents originally published as weekly features in The San Francisco Chronicle. This USGS General Information Product presents some of the new understanding gained and scientific advances made in the century since the Great 1906 San Francisco Earthquake. | |||
USGS | Basics Effects, Earthquake Engineering, Earthquake Faults - SS, DS, Thrust, etc. Hazards Paleoseismology Preparedness San Andreas Fault Seismic waves Trenching | ![]() | Middle School High School Elementary school General Audience |
Who Dunit? and the Law of Superposition (PDF) — solve a crime, and then use those same skills to understand the Law of Superposition (older layers of the earth on bottom) with a fun WhoDunit? investigation and then use your skills to solve a geological mystery | |||
USGS | Trenching Paleoseismology Lessons online Geology Education resources Earth structure | ![]() ![]() | Elementary school |