I have received radiocarbon dates >11,000 years of age.
FYI, this request from GD arose in response to my original point about the young earth and flood geology being falsified and abandoned by pre-Darwinian, creationist geologists.
I cited this historical fact as a refutation of GD's claim that rejection of YEC had a "metaphysical" and antievolutionary basis. IOW YEC was debunked by scientists who were ALL antievolutionists, and most of whom were also strong Christians (e.g. Sedgewick, Buckland, Coneybear, Hugh Miller, etc) so it couldn't have been, and historically wasn't, based on or in defense of evolution.
So, anyway, strictly speaking, the facts falsifying YEC should be from among those that convinced scientists prior to 1859, which of course was before radiometric dating.
That said, GD has probably been too busy moving his goal posts to follow the discussion that closely anyway.
After reading The Origin of Species, Sedgwick candidly wrote to Darwin on November 24, 1859:
If I did not think you a good tempered & truth loving man I should not tell you that. . . I have read your book with more pain than pleasure. Parts of it I admired greatly; parts I laughed at till my sides were almost sore; other parts I read with absolute sorrow; because I think them utterly false & grievously mischievous-- You have deserted-- after a start in that tram-road of all solid physical truth-- the true method of induction. . .