Date of Award


Degree Name

Master of Science


Geological and Environmental Sciences

First Advisor

Dr. William B. Harrison HI

Second Advisor

Dr. W. Thomas Straw

Third Advisor

Dr. John D. Grace

Access Setting

Masters Thesis-Open Access


The Filer Sandstone, a multistory assemblage o£ lenticular sand bodies, is a member of the Middle Devonian Amherstburg Formation of the Detroit River Group in the subsurface of the western and central portion of the Michigan Basin. It is distinguished from the reworked eolian and nearshore marine sand facies of the underlying Sylvania Sandstone by recognition of its barrier island facies relationships and stratigraphic position within enclosing carbonates unique to the Amherstburg Formation. Lithologically, the Filer ranges from a fine-grained, carbonate-cemented, supermature quartzarenite at its upper shoreface facies, to a texturally-inverted sandy carbonate at its lagoonal facies. Facies distribution was controlled by sea floor topography. Source area for the sand is believed to be Cambrian and Ordovician sandstones of the Wisconsin Highland region to the northwest. From there, wind and streams distributed the sand to oscillating strandlines with attendant barrier islands in the Amherstburg Sea.

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