Erosion
Create U-shaped valleys
What is a glacier?
This volcano had a major eruption 7700 years ago
What is Mount Mazama (or Crater Lake)?
The range of volcanoes and mountains in British Columbia, Washington, Oregon, and California
What is the Cascade Range?
A rock that floats in water
What is pumice?
The tectonic plate off the coast of Oregon and Washington
What is the Juan de Fuca Plate?
A desert rock that is easy to erode
What is sandstone?
The way that the Willamette Meteorite got to Oregon from Canada
What is the Missoula Floods?
When a volcano collapses after an eruption
What is a caldera?
What are igneous, metamorphic, and sedimentary?
The last supercontinent, breaking up over 200 million years ago
What is Pangea?
A porous rock that erodes quickly and can lead to sinkholes
What is limestone?
The nickname of the magnitude 9.0 earthquake that will strike Oregon in the future
What is The Big One?
The rock that lava flows harden into
What is basalt?
A black, shiny volcanic rock with white patterns
What is snowflake obsidian?
The plate boundary found around the Ring of Fire, creating volcanoes and causing earthquakes
What is a subduction zone?
The reason a river cuts through mountains instead of going around
What is the river is older than the mountains?
The event that created Haystack Rock at Cannon Beach
What are the lava flows from the Columbia River Basalt Group?
The group of small volcanoes in the Portland area
What is the Boring Volcanic Field?
Granite is this type of rock
What is igneous?
The largest earthquake in history occurred here
What is Chile?
The Arabic name for a dried river bed where flash floods can occur
What is a Wadi?
The mythical bridge in the Columbia River Gorge formed by a landslide
What is the Bridge of the Gods?
The type of volcano that Mauna Loa, Mauna Kea, and Kilauea in Hawaii are
What is a hotspot volcano?
Light detection and ranging, a mapping system used to see the topography of the land without tree and building interference
What is LiDAR?
The longest mountain range in the world
What is the Mid-Atlantic Ridge?