Earth during the Calymmian period

A hyper-realistic depiction of Earth during the Calymmian period, 1.6 billion years ago: a vast, ancient seascape with barren, rocky continents and shallow, mineral-rich oceans under a hazy, muted blue sky. Atmospheric effects hint at a thicker atmosphere with little oxygen, while primary colors are earthy reds, browns, and dark greens from early microbial mats along coastlines. No advanced life forms or vegetation, only evidence of stromatolites and primitive cyanobacteria colonies along water’s edge. Rendered in photorealistic detail, emphasizing geological formations and ancient, primordial landscapes.