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 rock formation located within the Margaritifer Sinus quadrangle (MC-19) region of Mars. This geological feature was initially identified and studied by the Mars Exploration Rover Opportunity in February 2004.