Bedrock
Bedrock underlies soil, regolith, and sediment. This topic is part of Geology within Science & Nature. This page currently draws on 13 supporting questions, with answers and bonus facts available below.
Bedrock trivia questions
Bedrock is solid rock found beneath what?
Answer: Soil and loose sediment
Bonus fact: Bedrock underlies soil, regolith, and sediment.
What term describes loose weathered material lying above bedrock?
Answer: Regolith
Bonus fact: Regolith includes soil and broken rock.
How can exposed bedrock reach the surface naturally?
Answer: Erosion removes overlying material
Bonus fact: Erosion can strip away soil and sediment to reveal bedrock.
What term describes an isolated boulder transported and deposited by a glacier, often differing from local bedrock?
Answer: Glacial erratic
Bonus fact: Glacial erratics can be carried great distances by moving ice before being deposited.
Which moving agent can polish and scratch bedrock through abrasion using embedded stones?
Answer: Glacier
Bonus fact: Rock fragments frozen into glacial ice can grind against underlying bedrock.
What process lets rocks frozen into a glacier scrape bedrock?
Answer: Abrasion
Bonus fact: Embedded debris grinds against valley floors and walls.
Why is bedrock geology important in construction?
Answer: It affects foundation stability
Bonus fact: Rock type and fractures influence engineering decisions.
Sinkholes are especially associated with what type of bedrock?
Answer: Limestone
Bonus fact: Groundwater can dissolve limestone underground.
What type of rock dominates the bedrock of Yosemite National Park?
Answer: Granite
Bonus fact: Yosemite's granitic bedrock cooled slowly from magma deep underground.
What branch of geology maps the types and ages of underlying rock?
Answer: Bedrock geology
Bonus fact: Bedrock maps show rock units and structures.
Half Dome in Yosemite is composed mainly of which named rock unit?
Answer: Half Dome Granodiorite
Bonus fact: The Half Dome Granodiorite is part of Yosemite's extensive granitic bedrock.
What is the name of the prehistoric town where The Flintstones live?
Answer: Bedrock
Bonus fact: The Flintstones premiered on ABC in 1960.