Geocaching and Glacial History

In this video, Nick and Renee explore a glacial erratic rock in Peoria, Illinois, that originated from Canada. They explain the concept of geocaching and earth caches, which are geology-related treasures. The video details the journey to find the rock, its geological significance, and the history of glaciers in the area. It also touches on the impact of climate change on glaciers and the presence of fossils from the ice age.

What is geocaching primarily about?

• Exploring caves and underground tunnels

• Collecting rocks from different locations

• Finding hidden treasures using a GPS device

• Hiking in national parks

What is the name of the user who posted the geocache they are searching for?

• Illinois Sam

• Rocky Bob

• Peoria Bill

• Canada Joe

What is a glacial erratic?

• A fossilized dinosaur bone

• A volcanic rock formed in Illinois

• A rock transported by glaciers from a different location

• A type of rare gemstone found in Canada

What causes the parallel grooves on a glacial erratic?

• Scraping by other rocks during transport

• Animal activity

• Human carving

• Erosion by wind and rain

How long ago did the glaciers leave Peoria?

• 20,000 years ago

• 1,000 years ago

• 10,000 years ago

• 5,000 years ago

What kind of creatures lived in the area during the last ice age?

• Giant sloths

• Sabertooth tigers

• Dinosaurs

• Mastodons and mammoths

Where can you see a part of a mastodon jaw and teeth?

• At the city zoo

• In the local library

• At the Peoria Riverfront Museum

• In a private collection

What is the current state of the remaining glaciers from the last ice age?

• Completely melted

• A sheet of ice less than 100 miles across

• Located in Antarctica

• Growing larger each year

How much thinner is the remaining glacier sheet getting each year?

• Ten feet

• Five feet

• One foot

• Three feet

In how many years is the remaining glacier sheet expected to be completely gone?

• 300 years

• 100 years

• 50 years

• 500 years