the best way to extract parameters of a xml in oracle through select

I have a catalog in xml oracle but as extract value of a structure xml for example;

<Estaciones>
  <Estacion>
    <Nombre>Primavera</Nombre>
      <Inicia>Marzo</Inicia>
        <Termina>Septiembre</Termina>
   </Estacion>
</Estaciones>

and so on for all seasons

Then make a select to compare each inicioMes and as a result the station