Ad
related to: depths entrances totk location near me for sale craigslist
Search results
Results From The WOW.Com Content Network
The entrance location and size determines, ultimately, whether the structure is a passage grave or a dolmen (J. Ross). In the Netherlands ( Drenthe ), where this form is very common, structures with no passages are known as portal graves; which otherwise, as portal tombs form a sub-group of megalithic tombs on the British Isles but structurally ...
This list of deepest mines includes operational and non-operational mines that are at least 2,224 m (7,297 ft), which is the depth of Krubera Cave, the deepest known natural cave in the world. The depth measurements in this list represent the difference in elevation from the entrance of the mine to the deepest excavated point.
Loops to test survey accuracy may also be made by surveying across the surface between multiple entrances to the same cave. The use of a low-frequency cave radio can also verify survey accuracy. A receiving unit on the surface can pinpoint the depth and location of a transmitter in a cave passage by measurement of the geometry of its radio waves.
At that time the natural entrance was also sealed off at the request of the Hualapai Indians as it was considered a sacred burial place. Near the natural entrance, the skeletal remains of a Paramylodon harlani (Glossotherium harlani) were also found. This giant and extinct ground sloth lived during the Age of Mammals around 11,000 years ago ...
An Early Marksville culture site located near Port Gibson in Claiborne County, Mississippi, on a bluff 1 mile (1.6 km) east of the Mississippi River, 2 miles (3.2 km) north of the mouth of the Big Black River. [7] The site has an extant burial mound, and may have possibly had two others in the past. The site is believed to have been occupied ...
Depths are measured in a variety of ways. Historically the sounding line was used. In modern times, echo sounding is used for measuring the seabed in the open sea. When measuring the safe depth of water over an entire obstruction, such as a shipwreck, the minimum depth is checked by sweeping the area with a length of horizontal wire.
While the official max depth is listed as 59 ft (18 m), there is a spring near Half Loon Bay, a small bay near Bridgton Academy, that registers as being 216 ft (66 m) deep, according to depth finders on multiple boats.
Until June 2013, about 10 people drowned near San Luis pass on the Galveston side since 2001, [4] and of those about 6 drowned there since 2007. [5] The depth of the pass varies in depths to 40 feet deep. [1] Tides cause daily variations in topography, and occasionally, storms more drastically change the topography of the pass.