This map folio set is a collaborative research project between the United States Geological Survey (USGS) and the Arkansas Geological Survey (AGS). This map series consists of a digital database with a series of interpretive digital maps (plates) depicting the location, depth, and thickness of lignite resources in the Mississippi Embayment province of eastern Arkansas.

List of plates and physical size:

• Eastern Arkansas Lignite Resources Index Map - 50" x 60"
• Plate 1A Black Cloud Isopach Seam "G" - 24" x 17"
• Plate 1B Black Cloud Isopach Seam "D" - 24" x 17"
• Plate 1C Black Cloud Isopach Seam "C" - 24" x 17"
• Plate 1D Black Cloud Depth to Lignite Seam "G" - 24" x 17"
• Plate 1E Black Cloud Depth to Lignite Seam "D" - 24" x 17"
• Plate 1F Black Cloud Depth to Lignite Seam "C" - 24" x 17"
• Plate 2A Blytheville & Minnesota Ridge Isopach Seam "C" - 28" x 24"
• Plate 2B Blytheville & Minnesota Ridge Isopach Seam "C1" - 28" x 24"
• Plate 2C Blytheville & Minnesota Ridge Isopach Seam "B" - 28" x 24"
• Plate 2D Blytheville & Minnesota Ridge Isopach Seam "A" - 28" x 24"
• Plate 2E Blytheville & Minnesota Ridge Depth to Lignite Seam "C" - 28" x 24"
• Plate 2F Blytheville & Minnesota Ridge Depth to Lignite Seam "C1" - 28" x 24"
• Plate 2G Blytheville & Minnesota Ridge Depth to Lignite Seam "B" - 28" x 24"
• Plate 2H Blytheville & Minnesota Ridge Depth to Lignite Seam "A" - 28" x 24"
• Plate 3A Kangaroo Point Isopach Seam "D" - 20" x 13"
• Plate 3B Kangaroo Point Isopach Seam "C" - 20" x 13"
• Plate 3C Kangaroo Point Depth to Lignite Seam "D" - 20" x 13"
• Plate 3D Kangaroo Point Depth to Lignite Seam "C" - 20" x 13"