Pillow basalt

Beneath the seafloor

Basaltic lava cools rapidly in seawater, often forming rounded pillows with chilled rims. These solid lava flows make up the upper volcanic part of much oceanic crust.

html,body{position:static!important;height:auto!important;overflow:auto!important}body{color:#e8f1ff}body>:not(noscript){display:none!important}#static-seo-content img{display:block;max-width:100%;height:auto}#static-seo-content{max-width:800px;margin:40px auto;padding:24px;font:16px/1.7 Arial,sans-serif}#static-seo-content a{color:#a8d5ef}#static-seo-content nav{display:flex;flex-wrap:wrap;gap:12px} Folded sedimentary rock beneath the seafloor, with labels for natural gas, oil, formation water, seal rock and source rock.

Folded sedimentary rock beneath the seafloor, with labels for natural gas, oil, formation water, seal rock and source rock.

Pillow basalt

Basaltic lava cools rapidly in seawater, often forming rounded pillows with chilled rims. These solid lava flows make up the upper volcanic part of much oceanic crust.

Ocean trench Earth’s interior Pillow basalt · Wikipedia