Receptaculitids are extinct high-level fossils that provide a window into the history of life. After the discovery and analysis of a deposit of phosphatized receptaculitids on the Baltic Sea island of Öland, the authors conclude that receptaculitids possess an attribute not found in any other group of organisms, living or fossil.

A preceramic cultural chronology for the north shore of Lake Ontario is synthesized with eastern North American archaeological and paleoenvironmental research. Analysis include projectile point identifications, lithic metric attributes, raw material sources and site characteristics.