@mackenzie-smith I am seeking help identifying these leaves. They are from the Tullock Member of the Fort Union Formation. Site is northern edge of Miles City, Montana. I have gone to Rsearcher Gate and found a number of papers but none have images of these leaves. The leaves in the larger plate are about 3 x 7 cm. Secondary viens stater at base as palmate and the alternate along main vein. Secondary veins divide near margin . Toothe is serrate Mixed in with these leaves are Sequoia leaves and bark and grass or maybe pine needles. Rock is a clay shale.