Page-Ladson

Page-Ladson
Name	Page-Ladson
Caption	Submerged karst sinkhole and excavation area
Map type	North America
Location	Ponte Vedra Beach, Duval County, Florida, Florida
Region	Florida peninsula
Type	Submerged sinkhole site
Epochs	Pleistocene, Holocene
Cultures	Pre-Clovis
Excavations	1980s–2010s
Archaeologists	Jeffrey C. Hoffmann, Jessie R. G. McNutt, Michael F. (Mike) Waters, James S. Dunbar

Page-Ladson is an underwater archaeological and paleontological site in a karst sinkhole near Ponte Vedra Beach on the Aucilla River in Florida. The site produced early human artifacts, megafaunal remains, and well-preserved stratigraphy that have informed debates about Peopling of the Americas, Clovis culture, and Late Pleistocene extinction events. Excavations by teams including Michael F. Waters, James S. Dunbar, and others have generated interdisciplinary work involving archaeology, paleontology, geochronology, and palynology.

Discovery and Excavation

Initial recognition of the site followed surveys by local divers and researchers linked to University of Florida and Florida Museum of Natural History. Early work in the 1980s involved divers associated with Florida State University and independent researchers who documented submerged karst features near the Aucilla River. Renewed systematic excavations beginning in the 1990s and intensifying in the 2000s were led by teams connected to Texas A&M University, Smithsonian Institution, and the University of Florida under coordination with state agencies like the Florida Division of Historical Resources. Excavation methods combined underwater archaeology techniques used at Meadowcroft Rockshelter, Monte Verde, and Cactus Hill with paleontological methods applied at Rancho La Brea and La Cotte de St Brelade. Key field seasons produced in situ recovery of lithic artifacts and faunal elements documented by scholars such as Thomas W. Stafford Jr., Dennis Stanford, Douglas J. Kennett, and Clive Oppenheimer in collaborative publications.

Geology and Site Stratigraphy

The site occupies a submerged limestone sinkhole formed in karst terrain of the Florida Platform similar to other sites like Wacissa River locales. Stratigraphic work integrated sedimentology, micromorphology, and stratigraphic correlation practices used at Gault Site and Cactus Hill. Distinct depositional units include peat-rich horizons, sand lenses, and organic silt intervals comparable to sequences at Paisley Caves. Tephrochronology and correlation to regional sea-level curves similar to reconstructions by Philip D. Gingerich and William F. Ruddiman aided interpretation of sediment accumulation and inundation phases.

Paleoenvironment and Dating

Multi-proxy paleoenvironmental reconstructions used radiocarbon dating, optically stimulated luminescence as in studies at Cueva de los Aviones, and amino acid racemization analogous to research at Mammoth Site. Radiocarbon determinations on charcoal and bone collagen placed human-associated strata in the terminal Pleistocene—predating or contemporaneous with early Clovis sites like Blackwater Draw and Gault Site. Palynological and plant macrofossil analyses referenced methods applied at Lake Tulane and Sweetwater River reconstructions to infer open woodland, pine savanna, and mixed deciduous environments during deposition. Stable isotope work paralleling research by John Ehleringer and Marta Z. H. Novello informed dietary and paleoenvironmental interpretations.

Archaeological Finds and Artifacts

Recovered lithic material includes flaked stone artifacts described using analytical frameworks from studies of Clovis point technology, stemmed projectile points at Cactus Hill, and biface reduction sequences documented at Gault Site. Tools were analyzed using use-wear approaches associated with work by David W. Trimble and typological comparisons to assemblages from Meadowcroft Rockshelter and Monte Verde. Charcoal concentrations and burned bone fragments yielded behavioral inferences resonant with hearth features at Paisley Caves. Artifact provenience and stratigraphic integrity were evaluated with protocols developed by Philippe Dillmann and R. Lee Lyman to address questions of redeposition.

Faunal Remains and Paleoecology

The faunal assemblage includes remains of proboscideans comparable to Mastodon and elephantid studies at Rancho La Brea, megafauna such as Bison antiquus paralleling specimens from Olsen-Chubbuck Site, and medium-bodied mammals akin to material from Shenandoah National Park contexts. Taphonomic analyses employed frameworks used by Larry D. Martin and Gordon C. Jacoby to distinguish human modification from carnivore or fluvial processes. Paleoecological interpretation integrated megafaunal extinction hypotheses discussed by researchers like Paul S. Martin and David J. Meltzer, with attention to climatic drivers explored by William Ruddiman and Peter U. Clark.

Significance for Pre-Clovis Occupation

Findings have contributed to the broader debate over pre-Clovis human presence in the Americas alongside sites such as Monte Verde, Cactus Hill, Paisley Caves, and Bluefish Caves. Evidence from the site has been cited in discussions involving models proposed by Tom Dillehay, Michael R. Waters, and Douglas J. Kennett concerning coastal and inland migration routes including the kelp highway hypothesis and inland ice-free corridor concepts associated with work by Gordon B. Noriega and Ruth E. Dickinson. The combination of stratified artifacts, dated faunal remains, and preserved environmental indicators makes the site a key reference point in reassessing timing, routes, and adaptive strategies of early peoples who colonized North America.

Category:Archaeological sites in Florida