What do the new and old people in syncline and anticline think? Isn't the syncline saying that the middle is new and the two sides are old? The picture says that it is from old to new.

Anticline: the middle part of the rock stratum is old and the wings are new;

Syncline: the two wings of the rock stratum are old, and only the curve of the rock stratum itself can be seen in the middle of the new judgment. The upward bulge is anticline, and the downward depression is syncline.

Syncline is a downward depression fold of rock stratum. Judging from the arrangement of the old and new relations of rock strata, the rock strata in the middle are relatively new, and the rock strata in the wings are getting older and older. In the wild, it can be identified according to this law. Standing on the park lawn in the south of Feilai Peak in Hangzhou, you can see that the limestone there bends downwards layer by layer, which is the Feilai Peak syncline.

If you go from tianmashan to the northwest, cross Feilai Peak and go straight to Beifeng, you will see the older sandstone first, then the newer Feibi limestone on the road, and finally the older sandstone will appear.

Extended data:

Application of anticline engineering;

Anticline is often a good oil and gas reservoir structure. This anticline is suitable for building tunnels.

Coal, oil, etc. It is formed by thousands of years of geological evolution and is closely related to new and old rock formations. Some sedimentary rocks containing oil and gas are deformed due to great pressure, and all the oil enters the anticline, forming an enriched area. Therefore, anticline structure is often a "warehouse" for storing oil, which is called "oil storage structure" in petroleum geology.

Usually, because the density of natural gas is the lowest, at the top of anticline structure, oil is in the middle and water is in the lower part. Finding oil and gas resources is to find such a place first.

Syncline engineering application:

Syncline is a good water storage structure. Syncline is suitable for building reservoirs.

Using syncline structure to find water. Synclinal strata have good water storage and abundant water, which is easy to find. The syncline structure is beneficial to groundwater recharge, and the water on the two wings gathers in the middle and penetrates into groundwater, so wells can be drilled in the syncline groove.