rhythmite

(from the article `varved deposit`) ...paired contrasting laminations of alternately finer and coarser silt or clay, reflecting seasonal sedimentation (summer and winter) within the ... ...all of the pre-existing relief and are now exposed, forming perfectly flat lake plains. Cuts into these sediments often reveal rhythmically ... [2...
Found on http://www.britannica.com/eb/a-z/r/45

Rhythmite

A rhythmite consists of layers of sediment or sedimentary rock which are laid down with an obvious periodicity and regularity. They may be created by annual processes such as seasonally varying deposits reflecting variations in the runoff cycle, by shorter term processes such as tides, or by longer term processes such as periodic floods. Rhythmite...
Found on http://en.wikipedia.org/wiki/Rhythmite
No exact match found