Buffalo Rock State Park has experienced three episodes of deposition and two episodes of weathering/erosion (gaps...

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Buffalo Rock State Park has experienced three episodes of deposition and two episodes of weathering/erosion (gaps in time caused by weathering and erosion). Follow the outline of the chart below to describe the which events were the oldest and which were the youngest. Event Answer Deposition Examples Erosion Youngest Answer Answer Answer Answer Answer Oldest Group/Formation Name Quaternary Glacial Till Carbondale Galena-Platteville St. Peter Shakopee N/A-Erosion Geologic Time Period of Deposition Quaternary Pennsylvanian Early Ordovician Middle Ordovician Late Ordovician N/A-Erosion Distinctive Features of Rock(s) Can include: Sediment size/sorting/angularity/composition, presence/type of fossils, crystals, reaction to HCI, etc. N/A-Erosion Rock Name Conglomerate Arkose Sandstone Siltstone Shale Fossiliferous- Limestone Dolostone Glacial Till N/A-Erosion Depositional Environment Glacial Deposition Mountains Beach Swamp Marine N/A-Erosion Inv. 10- LaSalle Area (Virtual) Field Trip 550 1000 Feet 550 Buffalo Rock CONTOUR INTERVAL 10 FEET NORTH AMERICAN VERTICAL DATUM OF 1988 Illinois River Road Major Contour Line Minor Contour Line ‒‒‒‒‒‒‒‒ Hachured Contour Line (depressions) x Strike & Dip Symbol 500- —— Body of Water Stream Map 1: North Illinois River FINAL DRAFT Legend (Rock Units) Buffalo Rock State Park Buffalo Rock State Park has experienced three episodes of deposition and two episodes of weathering/erosion (gaps in time caused by weathering and erosion). Follow the outline of the chart below to describe the which events were the oldest and which were the youngest. Event Answer Deposition Examples Erosion Youngest Answer Answer Answer Answer Answer Oldest Group/Formation Name Quaternary Glacial Till Carbondale Galena-Platteville St. Peter Shakopee N/A-Erosion Geologic Time Period of Deposition Quaternary Pennsylvanian Early Ordovician Middle Ordovician Late Ordovician N/A-Erosion Distinctive Features of Rock(s) Can include: Sediment size/sorting/angularity/composition, presence/type of fossils, crystals, reaction to HCI, etc. N/A-Erosion Rock Name Conglomerate Arkose Sandstone Siltstone Shale Fossiliferous- Limestone Dolostone Glacial Till N/A-Erosion Depositional Environment Glacial Deposition Mountains Beach Swamp Marine N/A-Erosion Inv. 10- LaSalle Area (Virtual) Field Trip 550 1000 Feet 550 Buffalo Rock CONTOUR INTERVAL 10 FEET NORTH AMERICAN VERTICAL DATUM OF 1988 Illinois River Road Major Contour Line Minor Contour Line ‒‒‒‒‒‒‒‒ Hachured Contour Line (depressions) x Strike & Dip Symbol 500- —— Body of Water Stream Map 1: North Illinois River FINAL DRAFT Legend (Rock Units) Buffalo Rock State Park

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