Abstract
SummaryThe records of the Richmond Quarry blast of August 16, 1934, indicate that the speed of longitudinal waves in the Franciscan formation of the San Francisco Bay region is 4.3 km/sec. The speed of transverse waves in the same medium is very probably 2.4 km/sec. The speed in the underlying medium is 5.4 km/sec. for the longitudinal waves and possibly 3.1 km/sec. for the transverse waves. The medium may therefore be identified as granite, which was to be expected from geological considerations.The thickness of the Franciscan formation in the region as computed from data given by this blast is about one kilometer.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.