| Locality | Latitude | Longitude | Distance | Bearing |
|---|
| Columbia coal mines, Mahaska County, Iowa, USA | 41° 20' 38" N | 92° 25' 17" W | 0.0km (0.0 miles) | |
| Spring Creek coal mines, Mahaska County, Iowa, USA | 41° 18' 2" N | 92° 33' 16" W | 12.1km (7.5 miles) | |
| Drill Hole (MRDS 10082006), Mahaska County, Iowa, USA | 41° 14' 45" N | 92° 36' 39" W | 19.2km (11.9 miles) | |
| Oskaloosa, Mahaska County, Iowa, USA | 41° 17' 47" N | 92° 38' 38" W | 19.3km (12.0 miles) | |
| Keswick, Keokuk County, Iowa, USA | 41° 27' 9" N | 92° 14' 21" W | 19.4km (12.1 miles) | |
| Keswick quarry, Keswick, Keokuk County, Iowa, USA | 41° 27' 59" N | 92° 15' 9" W | 19.6km (12.2 miles) | |
| Buck Creek Mine coal mines, Mahaska County, Iowa, USA | 41° 29' 16" N | 92° 35' 41" W | 21.6km (13.4 miles) | |
| Drill Hole (MRDS 10082042), Mahaska County, Iowa, USA | 41° 10' 30" N | 92° 34' 44" W | 23.0km (14.3 miles) | |
| Lost Creek coal mines, Mahaska County, Iowa, USA | 41° 10' 58" N | 92° 35' 35" W | 23.0km (14.3 miles) | |
| Evans coal mines, Mahaska County, Iowa, USA | 41° 30' 6" N | 92° 36' 51" W | 23.8km (14.8 miles) | |
| Eddyville area coal strip mines, Wapello County, Iowa, USA | 41° 9' 31" N | 92° 38' 4" W | 27.2km (16.9 miles) | |
| Occurrence (MRDS 10082043), Mahaska County, Iowa, USA | 41° 17' 7" N | 92° 44' 58" W | 28.2km (17.5 miles) | |
| Limestone quarry, Poweshiek County, Iowa, USA | 41° 31' 10" N | 92° 39' 58" W | 28.2km (17.5 miles) | |
| Kaser Quarry, Ollie, Keokuk County, Iowa, USA | 41° 12' 14" N | 92° 8' 19" W | 28.3km (17.6 miles) | |
| Harper quarry, Harper, Keokuk County, Iowa, USA | 41° 23' 46" N | 92° 5' 12" W | 28.5km (17.7 miles) | |
| Harper, Keokuk County, Iowa, USA | 41° 21' 45" N | 92° 3' 3" W | 31.0km (19.3 miles) | |
| Ollie, Keokuk County, Iowa, USA | 41° 11' 52" N | 92° 5' 32" W | 32.0km (19.9 miles) | |
| Occurrence (MRDS 10100293), Mahaska County, Iowa, USA | 41° 11' 46" N | 92° 45' 35" W | 32.7km (20.3 miles) | |
| Occurrence (MRDS 10082041), Mahaska County, Iowa, USA | 41° 13' 38" N | 92° 47' 9" W | 33.1km (20.6 miles) | |
| Star Coal Company strip mine, Mahaska County, Iowa, USA | 41° 12' 42" N | 92° 47' 5" W | 33.7km (21.0 miles) | |
| Occurrence (MRDS 10082005), Mahaska County, Iowa, USA | 41° 13' 35" N | 92° 47' 58" W | 34.2km (21.2 miles) | |
| Drill Hole (MRDS 10082009), Wapello County, Iowa, USA | 41° 2' 24" N | 92° 31' 4" W | 34.8km (21.6 miles) | |
| Mich mine, Oskaloosa, Mahaska County, Iowa, USA | 41° 11' 50" N | 92° 48' 12" W | 35.8km (22.3 miles) | |
| Drill Hole (MRDS 10082010), Wapello County, Iowa, USA | 41° 2' 38" N | 92° 36' 43" W | 37.0km (23.0 miles) | |
| Drill Hole (MRDS 10100294), Mahaska County, Iowa, USA | 41° 14' 42" N | 92° 51' 32" W | 38.2km (23.7 miles) | |
| Drill Hole (MRDS 10082040), Wapello County, Iowa, USA | 41° 1' 52" N | 92° 38' 17" W | 39.2km (24.4 miles) | |
| Drill Hole (MRDS 10082012), Wapello County, Iowa, USA | 40° 59' 54" N | 92° 31' 41" W | 39.5km (24.5 miles) | |
| Calcite locality, Pella, Marion County, Iowa, USA | 41° 22' 0" N | 92° 54' 50" W | 41.2km (25.6 miles) | |
| Drill Hole (MRDS 10082011), Wapello County, Iowa, USA | 41° 0' 14" N | 92° 37' 23" W | 41.4km (25.7 miles) | |
| Bussey area, Marion County, Iowa, USA | 41° 12' 24" N | 92° 53' 2" W | 41.6km (25.8 miles) | |
