Tag Archive for: trilobites

John Good

Massive Volcanic Eruptions Triggered Earth’s “Great Dying”

smithsonianmag.com

The world’s worst mass extinction has been a great whodunit for decades. Some 252 million years ago, 75 percent of land species and 90 percent of those in the oceans disappeared. But what caused trilobites, Eurypterid “sea scorpions” and all those other species to go extinct?

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Utah Geological Survey

“Glad You Asked” November 20, 2014

Trilobites are always a fun find when you’re exploring the outdoors, but how much do you know about Trilobites as living organisms? Maybe you’re just interested in finding your own Trilobite fossils. Read more about the little critters in our “Glad You Asked” article HERE!

Utah Geological Survey

POTD July 23, 2013: Trilobite, House Range, Millard County, Utah

 

Trilobite, House Range, Millard County, Utah
Photographer: Michael Vanden Berg

Cambrian-age shales from western Utah’s House Range contain millions of fossilized trilobites, such as this specimen of Elrathia kingi.

Utah Geological Survey

PUBLIC INFORMATION SERIES 93

pi-93FOSSIL ENVIRONMENTS IN UTAH
Carole McCalla

Colorful images show Utah’s different environments over the past 500 million years. Selected fossils from each environment are identified and range from ocean trilobites, to fresh-water fish, to plants, to dinosaurs, and Ice Age mammals.

1 p. (2 sided) flyer
PI-93……….free

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