| They conducted Xray diffraction and petrographic analysis of thin sections from a vessel suspected to have originated in the Caddoan region. |
| To assign the interbedded sedimentary strata to the correct system it is, however, necessary to incorporate biostratigraphic and petrographic data. |
| Discoplan-TS is a precision cutting and grinding machine for mineralogical, petrographic and ceramic thin sections. |
| These are accompanied by much smaller sets of petrographic thin sections from Mesozoic and Cenozoic carbonate strata. |
| Sediments and lavas were correlated in the field and by subsequent petrographic analysis of volcanic components and textures of deposits. |
| The sediments of the Grensen Formation are barren of all organic material and hence must be dated using radiometric and petrographic evidence alone. |
