ORGANIC LAYER (the most part consists in dead plants and animals), TOP SOIL ( rich in humus and roots of plants ), SUBSOIL ( rich in minerals, there are sand, clay, gravel), PARENT ROCK (soil and weathered rocks), BEDROCK (large unweathered rocks).

Classifica

Stile di visualizzazione

Opzioni

Cambia modello

Ripristinare il titolo salvato automaticamente: ?