| River Holford | |
| Subdivision Type1: | Country |
| Subdivision Name1: | England |
| Subdivision Type2: | County |
| Subdivision Name2: | Somerset |
| Subdivision Type5: | City |
| Subdivision Name5: | Holford |
| Length: | 4.5miles |
| Source1: | Lady's Fountain Spring, Frog Combe |
| Source1 Location: | Halsway, Quantock Hills, Somerset, England |
| Source1 Coordinates: | 51.1389°N -3.2156°W |
| Source1 Elevation: | 820feet |
| Mouth Location: | Kilve, Somerset, England |
| Mouth Coordinates: | 51.1928°N -3.2269°W |
| Mouth Elevation: | 0feet |
The River Holford is located in the east Quantock Hills Area of Outstanding Natural Beauty in Somerset England.
It is approximately 4.5miles long. Its source is at Lady's Fountain Spring, Frog Combe which is near Halsway and 250m (820feet) above sea level[1] before flowing past Holford towards its mouth at Kilve.[2]
The river is used as an outdoor classroom for students of Fluvial Geomorphology.[3]
The geology of the river consists of three different rock types. At the top of the river there is the Devonian Quartzite (Metamorphic), in the middle of the river there is the Permo-Triassic Marl (Sedimentary) and the lower part of the river consists of Jurassic Limestone (Sedimentary). The first two rock types are impermeable meaning there is little drainage for the river but the river depth becomes smaller as the water flows over the permeable limestone which will allow water to pass through. Quartzite is also very resistant to chemical weathering and can form ridges.