Orbitally forced sphalerite growth in the Upper Mississippi Valley District

Iron-Rich and Iron-Poor Mississippi Valley-Type Mineralization, Metaline District, Washington

Two texturally and mineralogically distinct types of Mississippi Valley-type mineralization are hosted by the upper Cambrian Metaline Formation in northeastern Washington. Josephine-type mineralization is iron poor and coarse grained, whereas Yellowhead-type mineralization is iron rich, fine grained, and commonly botryoidal. Josephine mineralization is found largely in the Josephine lithofacies...

Santa Clara Valley Water District

Orbitally forced climate changes in the Tasman sector during the Middle Eocene

Development of a Tree-Ring Chronology from Eastern Red Cedar (Juniperus virginia, L.) for the Upper Mississippi River Valley

Dendrochronology is the science that uses tree-rings dated to their exact year of formation to analyze temporal and spatial patterns of processes in the physical and cultural sciences. There currently is no published record for tree-ring studies using Eastern Red Cedar in the Upper Mississippi River Valley in Wisconsin. Therefore, this study develops a chronology from treerings using Eastern Re...

Mineralogy and Chemistry of Oxidized Ores from the Upper Silesia Mississippi Valley-type Zinc- Lead Deposits, Poland

1999 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.