Legend for plate 1
TECTONIC UNITS
| CRATONIC AREAS | SEDIMENTARY BASINS WITH CONTINUOUS MARINE SEDIMENTATION ACROSS SILURIAN - DEVONIAN BOUNDARY | ||
| ACTIVE FOLDER BELTS | |||
| OCEANIC BASINS | SEDIMENTARY BASINS WITH DEVONIAN CONTINENTAL STRATA CONFORMABLY OVERLAYING MARINE SILURIAN SERIES | 
For auxiliary symbols, abbreviations, and legend for other plates go to the complete legend.