Historical clue formulations

• Certain fossil preserve — 2022-08-07
• Archaeological treasure trove — 2017-12-31
• La Brea attraction — 2010-07-19
• La Brea attraction — 2009-02-16
• Likely fossil location — 2007-05-11
• Fossil preserver — 2002-05-31
• Archaelogical site — 1995-04-23