BETA
Chapter 1
The Yucatán smoking gun
Chapter 2
The Chesapeake Bay surprise
Chapter 3
The deep-ocean splash
Chapter 4
The detective tools of marine geology
YOUR GOAL
Master of Cosmic scars beneath the ocean floor
Ch 4 · The detective tools of marine geology
007skaty In 2022, geologist Uisdean Nicholson discovered the 8.5-kilometer Nadir crater, which may be a sibling fragment of the
Fun Fact
Earth's active crust: Earth has only 200 known craters because tectonic plate movement and erosion constantly erase them, unlike the barren, quiet Moon.
Glossary
seismic reflection (noun)
A method of geophysical exploration that uses sound waves to image geological structures beneath the Earth's surface. In 2022, Uisdean Nicholson used this technique to discover West Africa's underwater Nadir Crater.
A method of geophysical exploration that uses sound waves to image geological structures beneath the Earth's surface. In 2022, Uisdean Nicholson used this technique to discover West Africa's underwater Nadir Crater.
Quiz
Roughly what percentage of known impact craters on Earth occurred in marine environments?
Quiz
What is the name of the newly discovered, 66-million-year-old underwater crater off West Africa?
Quiz
What geological anomaly is mapped by scientists to trace the shape of buried craters?
Quiz
Which high-pressure mineral, found in Chicxulub cores in 2016, proves an impact occurred?
Quiz
What is the name of the Ukrainian impact crater that formed around 66 million years ago?
Quiz
What technology uses underground sound waves to map buried marine craters like Nadir?