Argiles d'lignite du Soissonnais
= Argiles d'lignite du Soissonnais
{wiki=Argiles_d'lignite_du_Soissonnais}
"Argiles d'lignite du Soissonnais" refers to a specific type of clay found in the Soissonnais region of France, which is notable for its lignite deposits. Lignite, also known as brown coal, is a type of coal that is intermediate in carbon content and energy output between peat and higher-grade coals.