In geology and related fields, a stratum (plural: strata) is a layer of sedimentary rock or soil with internally consistent characteristics that distinguish it from other layers. The "stratum" is the fundamental unit in a stratigraphic column and forms the basis of the study of stratigraphy.

When planning civil engineering projects or other large constructions, the strata of the area where the construction takes place is a significant factor in design decisions. For example if a canal is to be built on a route where the strata are not watertight, the canal will have to be lined with some form of waterproof material (usually clay).

Read more about Stratum:  Characteristics, Naming, Gallery

Other articles related to "stratum":

Stratum, Netherlands
... Stratum is a former village in the Dutch province of North Brabant, now one of the seven districts of Eindhoven ... Stratum was a separate municipality until 1920, when it became part of Eindhoven ... Most of Stratum's neighbourhoods were built between 1920 and 1950 ...
Stratum Spinosum
... The stratum spinosum (or spinous layer) is a layer of the epidermis found between the stratum granulosum and stratum basale ... Keratinization begins in the stratum spinosum ...
Corneocyte - Structure
... a highly hydrophobic lipid matrix to form the stratum corneum ... Corneocytes in the lower part of the stratum corneum are bridged together through specialized junctions (corneodesmosomes) ... entry pores for microorganisms across the stratum corneum ...
Stratum Lucidum Of Hippocampus
... The stratum lucidum of the hippocampus is also a layer of the hippocampus between the stratum pyramidale and the stratum radiatum ... Any given pyramidal cell in the stratum lucidum may get input from as many as 50 granule cells ...
Where Cutaneous Conditions Occur - Epidermis
... superficial layer of skin, a squamous epithelium with several strata the stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum ... squamous epithelium is maintained by cell division within the stratum basale, in which differentiating cells slowly displace outwards through the stratum spinosum to the stratum corneum, where cells are ... layer, and an additional two weeks to cross the stratum corneum ...

Famous quotes containing the word stratum:

    If you chance to live and move and have your being in that thin stratum in which the events that make the news transpire,—thinner than the paper on which it is printed,—then these things will fill the world for you; but if you soar above or dive below that plane, you cannot remember nor be reminded of them.
    Henry David Thoreau (1817–1862)

    Once it chanced that I stood in the very abutment of a rainbow’s arch, which filled the lower stratum of the atmosphere, tinging the grass and leaves around, and dazzling me as if I looked through colored crystal. It was a lake of rainbow light, in which, for a short while, I lived like a dolphin. If it had lasted longer it might have tinged my employments and my life.
    Henry David Thoreau (1817–1862)

    The earth is not a mere fragment of dead history, stratum upon stratum like the leaves of a book, to be studied by geologists and antiquaries chiefly, but living poetry like the leaves of a tree, which precede flowers and fruit,—not a fossil earth, but a living earth; compared with whose great central life all animal and vegetable life is merely parasitic.
    Henry David Thoreau (1817–1862)