Kaltura Share to Google Classroom A little further down the trail, Rudy and Jim come across a sandstone rock, which has cemented over time, due to the abundance of iron in the soil. Grades: 3 4 5 6 7 8 9 10 11 12 Subjects: ScienceEarth ScienceEarth's History Collection: ETV StreamlineSCSouth Carolina CountiesLexingtonExplore South CarolinaNational Great Outdoors MonthRudy Mancke Collection Series: NatureScenePeachtree Rock (S.C.)