http://oaklandgeology.wordpress.com/2007/12/01/knocker-ocean-view-drive/ focused on, near and under Oakland, California Sat, 18 May 2013 23:16:21 +0000 hourly 1 http://wordpress.com/ http://oaklandgeology.wordpress.com/2007/12/01/knocker-ocean-view-drive/#comment-11 Wed, 05 Dec 2007 21:23:37 +0000 http://oaklandgeology.wordpress.com/2007/12/01/knocker-ocean-view-drive/#comment-11 I have no idea. But it’s a name long used by workers in the Franciscan rocks of California. The AGI Glossary cites a 1972 article in the AAPG Bulletin, “What Is Franciscan?” by Berkland et al. The Glossary calls it a handy term for tectonic blocks or exotic blocks. Knockers are the boulders and larger blocks of bedrock you see protruding from the hillsides in the Coast Ranges. They’re the plums in the bedrock pudding called mélange. You won’t see the term used anywhere else in America (possibly in Alaska).

]]> http://oaklandgeology.wordpress.com/2007/12/01/knocker-ocean-view-drive/#comment-10 Tue, 04 Dec 2007 19:33:21 +0000 http://oaklandgeology.wordpress.com/2007/12/01/knocker-ocean-view-drive/#comment-10 ok, I give, where did they get the name “knocker”? (having grown up in southwest missouri, I know all about balds (glades) and shut-ins (rapids)).

]]>