TIMELINE FOR ROCK LAYERS IN ZUNI MOUNTAINS AREA

CENOZOIC

BANDERA LAVAS- 10 Kyrs

ZUNI MT LAVAS- 80 Kyrs

OLD LAVAS- 1 Myrs

MESOZOIC

CRETACEOUS

MANCOS- 85 Myrs – shale, mudstone

DAKOTA- 95 Myrs -sandstones, shale, coal

JURASSIC

ZUNI- 160 Myrs- massive crossbeded sandstones

TRIASSIC

CHINLE- 215 Myrs. - sandstones, shale, petrified wood

PALEOZOIC

PERMIAN- 275 Myrs.

SAN ANDREAS- limestone

GLORIETA- sandstones

YESO- shale, limestone, gypsum

MESITA BLANCA- massive sandstone

ABO- spotted red sandstone

PRE-CAMBRIAN

GNEISSIC GRANITE 1.70 G yrs- foliated orange-red granite

METARHYOLITE 1.70 G yrs- fine grain crystalline

METADIORITE 1.78 G yrs- dark crystalline diorite

METAGABBRO 1.78 G yrs- dark crystalline gabbro