Explore the 'Geologiecollectie' page. Identify the name of the two amateur geologists and miners who gained worldwide fame for excavating the prehistoric flint mines of Rijckholt. State their full names and the names of the institutions where they worked as professional geologists.
Navigate to 'museumvalkenburg.nl'. Click on the 'Collectie' link (id: 62). Click on the 'Geologiecollectie' link (id: 74). Read the content on the 'Geologiecollectie' page to locate information about the Felder brothers. Identify the full names of the two brothers. Identify the institutions where they worked as professional geologists.
Successfully navigate to the 'Geologiecollectie' page. Identify the two amateur geologists as the 'gebroeders Felder' (Felder brothers). State their full names: W.M. Felder and P.J. Felder. State the institutions where they worked: ing. W.M. Felder at the 'geologisch bureau Heerlen' (Geological Bureau Heerlen) and ing. P.J. Felder at the 'Natuurhistorisch Museum Maastricht' (Natural History Museum Maastricht).