Apollinaris Patera Caldera in False Color (IMAGE) European Space Agency Caption Apollinaris Patera is an ancient shield volcano measuring approximately 180 by 280 kilometers at its base and rising to a maximum of 5 kilometers above the surrounding terrain. Shield volcanos are large volcanic structures with gently sloping flanks. The caldera of Apollinaris Patera takes the form of a large crater approximately 80 kilometers in diameter. In this false-color image, north is to the right. The image also shows the terrain partly covered by thin, diffuse clouds indicated by bluish-tinted areas. This false-color image was captured on October 26, 2004, by the High-Resolution Stereo Camera (HRSC) onboard the ESA spacecraft Mars Express with a ground resolution of approximately 11.1 meters per pixel. Credit ESA/DLR/FU Berlin (G. Neukum) Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.