sedimentary

Soil Aggregates

Pedological aggregates (Unconsolidated regolith)

Variable hardness depending on clay content, earthy color ranging from brown to reddish-tan, dull luster, amorphous or granular structure.

Identified October 24, 2026More sedimentary →

Get a report just like this from any photo, free.

Physical properties

Variable hardness depending on clay content, earthy color ranging from brown to reddish-tan, dull luster, amorphous or granular structure.

Formed through the aggregation of mineral particles, organic matter, and soil biota over geological to recent timeframes.

Essential for agriculture, plant growth, civil engineering base layers, and geological study of earth history.

Soil aggregates protect organic carbon from microbial decomposition and are crucial for maintaining soil porosity and water infiltration.

Identified by crumbly texture and presence of mineral grains; found globally in surface terrestrial environments.

Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion

Calcareous concretion; exact fossil and host-rock composition are not identifiable from the image

Fossiliferous Sedimentary Rock

Sedimentary limestone with invertebrate fossil imprint

Sandstone or Siltstone

Arenite (if sandstone)

Sandstone

Arenite

Shale

Shale (clastic sedimentary rock)

Shale (or Mudstone/Siltstone)

Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)