geology of disney, tectonics

Could an Earthquake Destroy Disneyland?

  Disneyland may be one of the happiest places on Earth, but it’s also smack in the middle of California earthquake country. The San Andreas fault runs through nearly the entirety of California and has produced many great earthquakes. The San Andreas fault defines a tectonic boundary between the Pacific Plate and the North American… Continue reading Could an Earthquake Destroy Disneyland?

structure, tectonics

Which way is up?

No, your eyes aren’t deceiving you, these rock layers are nearly vertical! Although they were once horizontal, these Paleozoic sedimentary units have been tilted so that they now dip nearly 90 degrees. These rocks are located in northeast Tennessee and are part of the Appalachian foreland fold-thrust belt. Though built by multiple orogenies, the Alleghenian… Continue reading Which way is up?

structure, tectonics

How do you make a green rock?

Typically when we think of rocks, we don’t often picture them as having vibrant hues. Minerals themselves often come in a spectacular array of colors, but rocks overall tend to have more muted tones and earthy colors. These rocks (pictured above) from the Buckskin Mountains in western Arizona stand out in stark contrast to the… Continue reading How do you make a green rock?

structure, tectonics, wisconsin

Van Hise Rock

If you’re a structural geologist or geology student in the midcontinent region, you’ve most likely made the pilgrimage to Van Hise Rock. Located near Rock Springs, Wis., in the Baraboo quartzite range, Van Hise Rock is among the best-known structural geology landmarks in the Midwest. Van Hise Rock provides spectacular exposure of the nearly vertical… Continue reading Van Hise Rock

petrology, tectonics

Eclogite

Besides its aesthetic beauty and awesome vibrant colors, eclogite is a very rare and important rock. Eclogites are mafic metamorphic rocks that are formed in subduction zone settings. They experience metamorphism at extremely high pressures (1.2 GPa), greater than those typical of the Earth’s crust, as well as medium to high temperatures. They are responsible… Continue reading Eclogite