Reports preliminary results of study of pollen samples from La Atalaya, La Cofradia and Cerro de Moctehuma archaeological sites. The 4-zone stratified pollen sequence from La Ayala allows the other two sites to be cross-dated. Subsequently published in Southern Illinois Museum Papers.

Version of 1976 Marble Canyon report prepared for publication. Rejected by "Plateau."

Squash and possible maize pollen in sediment samples from checkdams suggests the features are prehistoric and were used for crop production. No evidence that local environment was different when the features were used.