The holes drilled into the Tertiary sediments were intended to be stopped in either the claystone aquiclude
(Tertiary clay) or the sandstone aquifer (Tertiary sand), but some were stopped at the interface between the two, or were drilled into an inter-layered sequence of sand and clay (Tertiary mixed).
Key to the legend: (1) Quaternary unit (QU) made of clastic aquifers and aquitards; (2) terrigenous unit (TU) made of clastic aquiclude
and aquitards from Miocene foredeep clayey deposits; (3) limestone aquifer unit (CU) made of continuous layers of Mesozoic to Cenozoic limestones; (4) dolostone unit (DU) made of Lower Mesozoic massive dolostones; (5) main tectonic lineament; (6) karst punctual spring; (7) karst streambeds; (8) water-well exploiting the carbonate aquifer; (9) locations of the geomechanical analysis; (10) town; (11) mountain peak; (b) examples of boreholes stratigraphies from CASMEZ .
This approach was considered reasonable given the presence of an aquiclude
zone as identified by Clark et al.
Segundo esses autores, existem cinco sistemas hidrogeologicos na area correspondente a estes dois municipios, formados por aquicludes
, aquitardes e aquiferos pertencentes as unidades estratigraficas Pirabas, Barreiras e Cobertura Quaternaria.
is scarcely dolomitized is probably due to the presence of marls, which may have acted as low-permeability barriers or aquicludes
for dolomitizing fluids.
Completely impermeable layers such as some types of bedrock are called aquicludes
. Aquitards have very slow permeability whereas aquicludes
are essentially impermeable.
2:45: VERTICAL CORRELATION OF THE PALYNOFLORAS OF THE AQUICLUDES
WITHIN THE HAGERMAN FOSSIL BEDS NATIONAL MONUMENT, HAGERMAN, IDAHO, Danielle M.
Meanwhile, the aquicludes
at the roofs and floors of the aquifers will be impacted by the mining processes.
(Chapter 13)--An impervious clay and/or rock layer that prevents water movement.
They found that carbonate aquifers and carbonate aquicludes
cannot be distinguished on the basis of porosity.
Confined aquifers are separated from the earth's surface by flow-impeding layers that, depending upon the degree of impedance, are called aquicludes
or aquitards (Figure 2).
An inquiry was made into the microflora of the aquicludes
200 feet stratigraphically below the deposits that contain the horse quarry (approximately 3100 feet elevation).