However, he focuses principally on the evidence from four excavated sites--Devils Lair, Tunnel Cave, Witchcliffe Rock Shelter and Rainbow Cave.
Dortch suggests that when occupation of Tunnel Cave ceased, humans would have stopped firing the forest, further enabling understorey regrowth in that area at the time.
At both Devils Lair and Tunnel Cave, the presence/absence and abundance of fossiliferous chert in relation to quartz (the two commonest materials in the sites) varied over time, but such variations correlate with changes in sea-level and the times at which fossiliferous chert would have been physically accessible.
Raw material conservation is evidenced in the use of fossiliferous chert at Tunnel Cave at the time sea-level started to rise (17,000-16,000 BP).
Two bats were found at Tunnel Cave, approximately 160 km southeast of the barn and one bat was found approximately 280 km south at Colossal Cave in Kentucky.
Dis- tance Date Location Bats (km) 8 August 1988 Terre Haute 1 24 11 October 1988 Ray's Cave 1 60 13 January 1989 Colossal Cave 1 280 27 January 1989 Ray's Cave 11 60 27 January 1989 Tunnel Cave 2 150 12 April 1989 Ray's Cave 2 60 13 January 1990 Ray's Cave 1 60 6 March 1990 King Blair Cave 1 48 30 July 1992 Prairie City 6 3