Parachute Creek References Parachute Creek Colorado, United States 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: oil shale/ Mineral contentOthers, such as the Parachute Creek Member of the GRF in Colorado, are marlstones, containing dolomite or calcite as well as silicate minerals such as clay, quartz, and feldspar. Read MoreOthers, such as the Parachute Creek Member of the GRF in Colorado, are marlstones, containing dolomite or calcite as well as silicate minerals such as clay, quartz, and feldspar. Read More