A diverse assemblage of Late Eocene woods from Oregon, western USA

The Phytophthora species assemblage and diversity in riparian alder ecosystems of western Oregon, USA.

Phytophthora species were systematically sampled, isolated, identified and compared for presence in streams, soil and roots of alder (Alnus species) dominated riparian ecosystems in western Oregon. We describe the species assemblage and evaluate Phytophthora diversity associated with alder. We recovered 1250 isolates of 20 Phytophthora species. Only three species were recovered from all substra...

Late Quaternary climatic controls on erosion rates and geomorphic processes in western Oregon, USA

Climate regulation of erosion in unglaciated landscapes remains difficult to decipher. While climate may disrupt process feedbacks that would otherwise steer landscapes toward steady erosion, sediment transport processes tend to erase past climate landforms and thus bias landscape evolution interpretations. Here, we couple a 50 k.y. paleoenvironmental record with 24 10Be-derived paleo-erosion r...

Some Eocene Dicotyledonous Woods from Eden Valley, Wyoming

Diverse New Microvertebrate Assemblage from the Upper Triassic Cumnock Formation, Sanford Subbasin, North Carolina, USA

The Moncure microvertebrate locality in the Cumnock Formation, Sanford sub-basin, North Carolina, dramatically increases the known Late Triassic age vertebrate assemblage from the Deep River Basin. The ,50,000 recovered microvertebrate fossils include osteichthyans, amphibians, and numerous lepidosauromorph, archosauriform, and synapsid amniotes. Actinopterygian fossils consist of thousands of ...

Spondyloarthropathy in cervical vertebrae of late prehistoric black bear from northwestern Oregon, USA

Spondyloarthropathy has been reported among modern individuals of several species of ursid. Prehistoric cervical vertebra of black bear (Ursus americanus) recovered from an archaeological site in northwestern Oregon are fused and distorted, indicating spondyloarthropathy in this species has some time depth. Inventory of this disease among paleozoological remains may reveal unknown details of di...