1 For subsidence caused by sudden collapse of the ground to form sinkholes, several measures can be taken. 2  First, geologists can make maps of areas known to be underlain by rocks like limestone, gypsum, or salt, that are susceptible to dissolution by fluids.
The Navajos used bows and arrows, spears, clubs, tomahawks, knives and sticks among their tools and weapons. Beyond these, they also used bolas and... The Navajos used bows and arrows, spears, clubs, tomahawks, knives and sticks among their tools and weapons. Beyond these, they also used bolas and blowguns. The Navajos employed the use of several tools and weapons:Bows and arrows were used by Native Americans to defend themselves, and sometimes for fishing. They also used them for hunting animals like bison.When fighting against European explorers, Native Americans used spears.
Hogans are the name of one of the styles of homes that the Apache people lived in. Hogans were made with a frame of logs and sticks and usually covered with mud. Hogans were one room dwellings that were unique in the fact that they were classified as male or female dwelling according to their shape.he settlers called them sod houses. Apache Indians Building Wickiup Art Print Buy at AllPosters.com Framed Mounted The wickiup was the most commonly used style for apache houses. The frame of the wickiup was made from thicker branches and covered in brush.