This river system consisted of active channels with fast transport of sand grains and gravel.
Granulometry of the conglomeratic layers appears to indicate that coastal gravel beds were subsequently reworked by fluvial activities.
The gravel deposits are made up of relatively well-sorted and rounded metamorphic and volcanic clasts.
Pieces of red brick, bits of smooth drainpipe, thick chunks of old cement, and that blue gravel you see on graves.
The two settlements are linked by a gravel road across the mountain ridge.
The gravel pit itself is used for angling purposes and is unsuitable as a feeding ground for birds because of its depth and steep sides.
These were finer than the original sediments that form the top of the active layer (sandy gravel).
Tubs were filled with sandy secondary forest topsoil over 5 cm of coarse gravel.
