The archaeologist explained that the skeleton's place in the soil strata and its size meant that it was not a dinosaur.

Over the centuries, the bedrock atop the mountain has been exposed through natural weathering of the upper layers of soil strata.

Test pits would be dug for a look at soil strata.

The calcareous soil strata within Potomac Creek, the Aquia Formation, is 60 million years old.

Because of the date on a coin found in the same soil stratum, we knew their deaths occurred sometime after 1885.

- 600,000 meters of geotechnical investigation and drilling in various soil strata including investigations for the Bangalore International Airport.

The soil strata contains mixed layers of clay soil, river pebbles and coarse sand in layers of 2m to 3m.

The area has a diversified soil strata, some fossilized shells mounted on sand that undergone sedimentation.

Trees and plant and grasses would be dug for a look at soil strata.

The side-effects (changes in soil strata, layers in icepacks, etc) were cited as mechanisms for roughly timing archeological events.