| Roca Redonda | |
| Elevation M: | 67 |
| Prominence M: | 67 |
| Map: | Ecuador Galápagos Islands |
| Label Position: | right |
| Location: | Galápagos Islands, Ecuador |
| Coordinates: | 0.27°N -91.63°W |
| Type: | Shield volcano |
| Last Eruption: | Unknown |
Redonda Rock (es|Roca Redonda, "Round Rock") is a flat-topped, steep-sided islet located roughly 25km (16miles) northwest of the island of Isabela in Ecuador's Galápagos Islands. Redonda measures 100m (300feet) long and 50m (160feet) wide with a maximum elevation of 67m (220feet).[1] Its isolation and inaccessibility coupled with its rocky cliffs riddled with crevices and crossed by ledges has made Redonda a haven for nesting seabirds.[2]
This small volcanic island is the remains of a large shield volcano that has vastly eroded away below sea level. Potassium–argon dating of Redonda indicates that the islet is at least 53,000 years old.[1] However, it remains unknown when the last eruption occurred from the shield volcano. Several shallow submarine fumaroles exist around the island and may indicate that the volcano is still active.[3]