504 resultados para QUATERNARY PERIOD

em Iowa Publications Online (IPO) - State Library, State of Iowa (Iowa), United States


Relevância:

60.00% 60.00%

Publicador:

Resumo:

Although during much of its geologic history Iowa was part of an interior sea, today what we see on the land surface has been heavily influenced by recent glaciation. Everything from Iowa soils, rivers, lakes, and hills has been influenced by glaciation. Most of Iowa’s bedrock is hidden beneath a thick mantle of deposits from the Cenozoic (i.e., new life) Era, spanning the last 65 million years. Geologists have divided the Cenozoic Era into two periods. These are the Tertiary (1.8-65 million years ago) and Quaternary Periods (recent to 1.8 million years ago). Most geologic records in Iowa are from the Quaternary period, and include glacial till and loess.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Report on a Special Investigation of the Central Point Coordination for Calhoun and Pocahontas Counties.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

City Audit Report - Special Investigation

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Community School District Audit Report - Reaudit

Relevância:

20.00% 20.00%

Publicador:

Resumo:

State Agency Audit Report - Special Investigation

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Other Audit Reports - Performance Investigation

Relevância:

20.00% 20.00%

Publicador:

Resumo:

City Audit Report - Special Investigation

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Other Audit Reports - Special Investigation

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Other Audit Reports - Dubuque County Reaudit