El Capitan is a layered rock outcrop found within the Margaritifer Sinus quadrangle (MC-19) region of the planet Mars, this geological outcrop was first discovered and observed by the Mars Exploration Rover Opportunity in February 2004.
El Capitan is a layered geological formation found within the Margaritifer Sinus quadrangle (MC-19) region of Mars. This feature was initially recognized and investigated by the Mars Exploration Rover Opportunity in February 2004.