#ancient ocean

[amnhnyc]

Welcome to Trilobite Tuesday! Gotland is a large island situated nearly 55.9 mi (90 km) off of Sweden’s southeastern coast. Since 1851, trilobites—like this 1.2-in- (3-cm-) long Encrinurus—have been excavated from the island’s Silurian deposits. Many of Gotland’s prime collecting spots now lie under the frigid waters of the Baltic Sea.

But trilobites aren’t the only things found here. Almost a millennium earlier, this 810.8-square-mile (2,100-square-kilometer) refuge served as an important Viking trading settlement, and remnants of it can still be found hidden on this area’s rugged, rock-strewn shores.

[venusianwonders]

New Study Shows Venus Likely Didn't Have Ancient Oceans for Long

Venus has long been discussed as a former "ocean world" like Mars, but a new study in PNAS shows this era may have been short lived.

Some considerations for the hypothetical Venusian ocean of the past

[ash-arts-a-thing]

Tylosaurus will probably be the only one coloured that way

[musicmakesyousmart]

Ancient Ocean - Blood Moon

Beyond Beyond Is Beyond

2015

[amnhnyc]

It’s Trilobite Tuesday! Meet Heliopeltis, one of Morocco’s strangest Devonian trilobites. This 400-million-year-old marine arthropod had a small body, large eyes, and long spines. Scientists think its unusual physique indicates that this species floated on gentle ocean currents.

[ash-arts-a-thing]

The henodus are done, one in particular being based on a special profound bond that @oncielover1 asked for

[ash-arts-a-thing]

The xiphactinus and cretoxyrhina are done, not sure how much I like the creto

[amnhnyc]

It's time for #TrilobiteTuesday! Every trilobite fossil tells a unique and often compelling tale. Whether it's a 500 million-year-old Hemirhodon amplipyge bearing a potentially fatal bite mark like the one pictured here, or a 450 million-year-old Primaspis crosotus appearing forever frozen amid a fossilized field of crinoid stems, each example of these primeval life forms possesses the capacity to provide a captured-in-time glimpse of a long-gone undersea kingdom. With a trilobite in hand and a healthy imagination at play, each of us can partake in a private sojourn back to a time when trilobites first filled the planet's oceans.