1. The Calapooya Mountains are composed of volcanic rocks and newer sedimentary strata . 2. Rare cases of columnar jointing have also been reported from sedimentary strata . 3. The rest of the district lies on Devonian sedimentary strata and the granite of Bodmin Moor. 4. Generally this occurs in certain carbon-bearing sediments, within an unconformity in sedimentary strata . 5. Unfortunately, paleo-depth constraints for sedimentary strata are poor and subject to contradicting interpretations. 6. IOCG deposits typically occur at the margins of large igneous bodies which intrude into sedimentary strata . 7. The Hakatai Shale is part of a conformable sequence of sedimentary strata that comprise the Unkar Group. 8. He also pointed out that oil pools in sedimentary strata are often related to fractures in the basement directly below. 9. 200 million years ago, sedimentary strata was being pushed along the sea floor as the result of seafloor spreading. 10. Pollen studies indicate that the Lower Cretaceous sedimentary strata that comprise this glacial erratic were transported a minimum distance of about.
