FIGURE 4 in Late Jurassic marine vertebrates from Tlaxiaco, Oaxaca State, southern Mexico

FIGURE 4. Geologic map and lithostratigraphical column of Yosobé. M, Marl stratum; L1-L8, limestone strata; the intermediate strata (L1-L2, L2-L3, ... L7-L8) are the bituminous shales layers that carry the vertebrate assemblage of Yosobé.