Near their northern limit Radiolarian cherts, mudstones and lavas of Arenig age rise from underneath the former along anticlines striking north-east and south-west.
Near Muirkirk and in the Douglas Water there are inliers of Wenlock, Ludlow and Downtonian rocks, coming to the surface along anticlinestruncated by faults and surrounded by Old Red Sandstone and Carboniferous strata.
Indicate by arrows the direction of pitch of all plunging anticlines and synclines wherever disclosed by changes of dip and strike (43).
Indicate upon the map by dashed lines the crests of all anticlines and the trough lines of synclines.
It might perhaps be supposed that the anticlines would appear as the mountains upon the surface, and occasionally this is true; as, for example, in the folded Jura Mountains of western Europe.
Anticlines or synclines whose limbs have about the same inclinations are known as upright or symmetrical folds.
Exploration for oil and gas led to the discovery of potash beneath several anticlines in eastern Utah and western Colorado.
Erosional anticlines also occur elsewhere, as along the Eagle and Roaring Fork valleys of central Colorado.
Anticlines are noted as sources of or at least hunting grounds for oil and gas, and this one is no exception, although production has been relatively small and was stopped altogether in about 1963.
Several anticlines at or near the river from Potash to and beyond the confluence (fig.
Simultaneously with the formation of these deposits, uplift of the sea-floor converted wider and wider areas into land, and this land underwent considerable denudation, so that the tops of the anticlines were worn away.
Some of the Medina anticlines of Perry and Juniata counties are not indicated because they were not then uncovered.
But all these Medina anticlinesrise more or less above the Cretaceous baselevel, and must have had some effect on the position taken by the river about the middle of that cycle when its channel sank upon them.
The only path of the kind is the narrow one between the overlapping anticlines of Blue Ridge and Shade mountains, and there the Juniata now flows.
Anticlines of hard sandstone were breached, and broad lowlands were opened on the softer rocks beneath.
A stream flowing along a syncline of hard beds (Carboniferous sandstones) develops side streams which breach the adjacent anticlines and open lowlands in the underlying softer beds (Devonian and Silurian).
Near the crest of anticlines is commonly an enriched portion of the ground in mineralized districts; and, in the case of water supply, the tilt of the strata determines the direction of the underground flowage.
For example, in many coal regions the deposits have been conserved in some districts in the synclines or "basins," while they have been removed by denudation from the uplifted anticlines in others.
The salt anticlines were uplifted in a series of pulses so that some formations either were not deposited over the rising structures or were removed by erosion before deposition of the next younger unit.
Figure 7 also shows that the northeastern part of the Paradox basin, which is the deepest part, contains a series of partly alined anticlines which have cores of salt and, hence, are called salt anticlines.
Salt anticlines within the Paradox Basin, in Geologic atlas of the Rocky Mountain region, United States of America: Denver, Colo.
The formation and collapse of the Salt Valley and Cache Valley anticlineswas accompanied by pronounced jointing (fig.
The salt anticlines of Utah and Colorado are unique in North America both in structure and in mode of development.
The ridge also marks the south edge of several minor anticlines and synclines termed by Dane the "Elephant Butte folds.
Anticlines and synclines are the common types of folds.
Folds (anticlines and synclines) and faults are the principal mechanical effects considered under structure.
The largest anticlineswhich have been found to act as specific reservoirs are rarely more than a few miles in extent, and in many cases only a mile or two.
As already indicated, anticlines are not always essential to make the necessary trapping conditions.
In certain fields, oil and gas have been found in the tops of anticlines in water-saturated rocks, and farther down the flanks of folds or in synclines in unsaturated rocks.
A considerable number of productive anticlines are known in which the beds dip so gently as to give a closure of 20 feet or less.
The Juras are an example of the stage of early youth, in which the anticlines still persist as ridges and the synclines coincide with the valleys; this they owe as much to the slight height of their uplift as to the recency of its date (Fig.
Fan folds have been so pinched that the original anticlinesare left broader at the top than at the bottom (Fig.
Under long-continued erosion, anticlines may be degraded to valleys, while the synclines of the same system may be left in relief as ridges (Fig.
The Juras are an example of the stage of early youth, in which the anticlines still persist as ridges and the synclines coincide with the valleys; this they owe as much to the slight height of their uplift as to the recency of its date.
Under long-continued erosion, anticlines may be degraded to valleys, while the synclines of the same system may be left in relief as ridges.
FAN FOLDS have been so pinched that the original anticlines are left broader at the top than at the bottom.
The anticlines will bend over, and the most southerly of the folds will gradually become pushed or bent over those lying to the north.
They have been formed from the overthrown and drawn-out anticlines of great crust-folds, whose synclines or roots are traceable to the south side of the Rhone Valley.
These represent the original anticlines and synclines of mountain-ranges, which in course of time are carved out, as explained above, until the synclines become hills and the anticlines valleys.
The drainage of the belt as a whole is anticlinal to a marked degree, for the three main synclinal lines are lines of great elevation, and the anticlines are invariably valleys.
On the anticlines were developed the chief streams, and the synclines were left till the last.
Approaching still nearer to =B=, the arches or anticlines would be seen eventually to bend over upon each other, so as to produce a general dip or inclination of the strata towards the central axis of the chain.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "anticlines" in a variety of sentences. We hope that you will now be able to make sentences using this word.
