English En
  • Deutsche De
  • English En
  • Français Fr
  • Русский Ru

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our marketing and analytics partners who may combine it with other information you've provided to them or which they've separately collected from you. You also may to see our Privacy Policy. By clicking the OK button below, you accept our cookies.

Authors:

No tools have yet been met with in any of the gravels occurring at the higher levels of the valley of the Seine; but no importance can be attached to this negative fact, as so little search has yet been made for them.

Charles Lyell