Environmental Enlightenment #132

By Ami Adini -
Reissued February 19, 2015

This is a SHORT, LIGHT and SIMPLE newsletter. Its purpose is to rekindle in the initiated terminology they have once learned, and enlighten the uninitiated on terms they may have heard but never knew the meaning of.


Investigations of contamination in the subsurface environment must deal with the various soil and rock structures that make this environment. In our reports, one may run into a term called “stratigraphy.” We use this term to describe the sequence or order of rock or soil layers in a geologic formation.

Stratum in Latin means horizontal layer, and strata is plural of stratum. These horizontal layers have been formed by deposits in the beds of rivers, lakes and seas. As the diagrams below depict, the layers may not be uniform in length, do not always stay horizontal and get cut and shifted up and down. Changes in the thickness of the layers and the sudden vertical shifts sometimes occur within short distances in the investigated sites.

You can find past issues of our  "Environmental Enlightenment" at amiadini.com Wealth of information about environmental site assessments in the real estate transactions and issues concerning assessment and cleanup of contamination in the subsurface soil and groundwater.

Call me if you have any questions. There are no obligations.

Ami Adini
Ami Adini & Associates, Inc.
Environmental Consultants
Underground Storage Tank Experts
818-824-8102; 818-824-8112 fax

Ami Adini is a mechanical engineer, California Registered Environmental Assessor, Level II (Exp.), and president of AMI ADINI & ASSOCIATES, INC. (AA&A), an environmental consulting firm specializing in all phases of environmental site assessments and rehabilitation of contaminated sites. AA&A specializes in practical solutions to environmental concerns using the highest standards of ethics and integrity while providing its clients with maximum return on their investments.