The first humans there built a ring dike to protect the land.

These mountains are the remains of an ancient volcanic ring dike.

The breach was caught and a ring dike was used to correct the problem.

The first is that they represent a surface manifestation of ring dikes or cone sheets.

The latter are known as ring dikes.

Engineers had hastily constructed a ring dike around United Hospital while it was being emptied.

Impact craters are not to be confused with landforms that in some cases appear similar, including calderas and ring dikes.

Earthquakes occurred in the vicinity of the ring dike in the summer and fall of 1845.

The ring dike surrounding the town gave out in late April, causing the town to be inundated with over two metres of water.

Ring faults may be filled by ring dikes.

According to field mapping and aeromagnetic data, the gabbroic rocks form two concentric ring dikes.

This breach was also caught early, and another ring dike was used to seal off the breach.

But these had initially no connection to the outside waterways, meaning that goods had to be reloaded at the ring dike.

The circular-shaped Pawtuckaway Mountains are a prime example of what geologists term a ring dike complex.

The Pawtuckaway ring dike includes a boulder field of interest to bouldering climbers, and the park is a popular destination for geocaching.

These ring fractures serve as feeders for fault intrusions that are also known as ring dikes.

The geological formation was the first ring dike to be mapped, although its significance was not understood until similar structures had been described from Scotland.

A similar ring dike can be seen in southern New Hampshire at Pawtuckaway State Park.

The ring dike will be provided with pumping system and retention area, would regulate and control seawater and use also as additional toll road.

Permanent ring dikes built around towns like Emerson, on the border with North Dakota, have kept the communities dry, albeit isolated.

The inner ring dike is about 20 m in width and lies about 3 km from the center of Richat Structure.

Enclosed by the ring dike and extending in to the flat floor of the wilderness is a large area of biotite and amphibole granite.

There are many different subsets of this method, including valley impoundments, ring dikes, in-pit impoundments, and specially dug pits.