Water plays a critical role in erosion and sediment transport and this relationship is most
evident in the hyperarid Atacama Desert of Northern Chile, a region characterized by …

The extent to which Paleozoic oceans differed from Neoproterozoic oceans and the causal
relationship between biological evolution and changing environmental conditions are …

Sequence stratigraphy provides an integrated framework within which to examine historical
patterns of paleontological phenomena. Depositional sequences are the stratigraphic record …

This paper is a revision of the standard chronostratigraphy of the Ordovician of the historical
type area in England and Wales. The revision is a response to the need for more precise …

In order to investigate the partitioning of trace elements in mineral phases of black shales
and diagenetic remobilization of trace elements within these phases, we isolated major …

Ordovician strata of the Mohawk Valley and Taconic allochthon of New York and the
Humber margin of Newfoundland record multiple magmatic and basin-forming episodes …

Study of depositional environments which demonstrate changes in water depth greatly
expands using depositional sequences to estimate fluctuations in past sea-levels. On …

Abstract The early Late Ordovician sedimentary rocks of eastern North America contain a
relatively large number (> 100) of widespread heavily altered tephra layers (K-bentonites) …

Abstract The 70 Ma Ordovician Period is characterized by extensive epeiric seas,
paleocontinent dispersal, intervals of intense volcanism and black shale deposition, a …

Stratal patterns of the Middle Ordovician Hagan K-bentonite complex and associated rocks
show that the Black River–Trenton unconformity in the North American midcontinent formed …