Trombetas Formation References Trombetas Formation geological region, Brazil Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Silurian Period/ TillitesSimilarly, the widespread Lower Silurian Nhamunda Formation in the Amazon region of Brazil includes diamictite (a non-sorted conglomerate made up clastic material) beds consisting of highly diverse clastics related to tillites. Read MoreSimilarly, the widespread Lower Silurian Nhamunda Formation in the Amazon region of Brazil includes diamictite (a non-sorted conglomerate made up clastic material) beds consisting of highly diverse clastics related to tillites. Read More