Resting unconformably above the El Boleo Formation are the Gloria , Infierno and Santa Rosalía Formations of the Pliocene and Pleistocene . Boleo Project , Mexico
Head entity: pleistocene Q25546 20
Tail entity: pliocene Q76259 18
Relation (head \u2192 tail): P155
Inverse relation (tail \u2192 head): P156