I want to know the answer to the following question:
Jean-Etienne Guettard and NIcolas Desmarest went to France and recorded what?
All the background I'm provided with is that "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.". Is that enough to answer the question?