Meadowcroft Rockshelter

western Pennsylvania, 1970s, 1980s, and 1990s woodland and archaic occupation indisputable stone artifacts and hearth in lowest stratum charcoal dates to before 16,000 cal BP Debate: 1. dates aren't good enough- potential contamination from flecks of coal, potential contamination from carbon-enriched water 2. response- over 50 dates total- almost all in order, evidence that there is no groundwater contamination> supported by paleo-police ^ has not yet been OFFICIALLY accepted