Question: Jean-Etienne Guettard and NIcolas Desmarest went to France and recorded what?
Sentence: Over the first half of the 19th century, geologists such as Charles Lyell, Adam Sedgwick, and Roderick Murchison applied the new technique to rocks throughout Europe and eastern North America, setting the stage for more detailed, government-funded mapping projects in later decades.
Answer in sentence: no