apparent velocityapparent water tableappendageappendixappertant structuresapplied geologyapplied geophysicsapplied seismologyappolo or appollo or appollo or appollonapproach velocityaprieierapronapron elevationapron interfernceapse lineapsheron formation or apsheron or apsheronapterousapterygotaapterygoteaptianaptychusapuaniteapureaqualiteaquamarineaquaticaquatic terraaquatilliteaqueduct or canal bridge or canal bridgeaqueous fusionaqueous ripple markaquic moisture regimeaquicludeaquidite dun solaquiferaquifer systemaquiferous systemaquifugeaquilonianaquitanianaquitardar or argon or argonarabesquiticarable landarachnidaragonite or nicolsonite or nicolsonite or tarnowitzitearaigneearakiitearamayoitearapovite
