oligomictic

oligomictic

[ə‚lig·ə′mik·tik]
(hydrology)
Pertaining to a lake that circulates only at rare, irregular intervals during abnormal cold spells.
(petrology)
Of a clastic sedimentary rock, composed of a single rock type.
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References in periodicals archive ?
(1987) to classify the lake as meromictic, although in a second paper they changed its classification to oligomictic (Gocke et al., 1990).
In both cases it is a highly angular unsorted oligomictic chlorite phyllite breccia containing fractured and partly broken clasts and likely tectonic in origin (Fig 3b).
It usually includes a basal oligomictic siliceous conglomerate (Table1), and its uppermost part contains marine intercalations of Spathian age (Belivanova, 2000).
After a quiescence period, caldera resurgence occurred during the Second Eruptive Epoch (SEE) with the formation of several vents inside it, most of them located at Olitas headstream; lava domes, block and ash flow deposits, pyroclastic surges and ignimbrites interbedded with lacustrine siltstones and torrential oligomictic conglomerates remained restricted to the caldera depression, while ash fall tuffs mantled inflow and outflow zones (Figure 2)(Cepeda & Pardo-Villaveces 2004; Pardo-Villaveces et al., 2005).
These basement-derived, oligomictic, and well-rounded or framework-supported conglomerate units have promise of being traced and/or correlated from section to section (Fig.
Rio Cuarto, appeared to be oligomictic (tending toward meromictic).
In northwestern Napadogan area, the tuff is underlain by oligomictic conglomerate whose quartzite clasts were derived from the Miramichi Group.