well, because dirt blows from one place to another, and different things happen... earthquakes floods, etc, that all move dirt from one place to another. Over time, whole cities can be buried, and new ones built on top. Dinosaur bones and other things of arcaeological interest all get buried... or eroded away, washed away, and buried somewhere else. So, when we want to look at things from a long time ago in history, we usually have to dig them up.
Archaelogical sites are buried because they are, for the most part, ruins of ancient civilizations that existed long ago. Civilizations die out and leave ruins in their wake because of other nations/peoples conquering them and moving them, or if they are deemed not worthy of saving (or if they are savage brutes who dislike hostages and slaves), they are killed and the place is leveled or burnt to the ground. In rare occasions, peoples move from one permanent location to another, which have led amateurs to believe that they died out, though they might have died out or were the victims of genocide in some other location. In even more rare occasions, towns and cities were burned to the ground and utterly destroyed by fiery rock and sulfur from heaven for very specific reasons, such as the case with Sodom and Gomorrah in The Bible. In addition to the above we have natural disasters, like the volcanic eruptions of Thira that caused the extinction of the Minoan civilization [1450 BC] and Vesuvius that buried the cities of Pompeii and Herculaneum [79 AD] in the times of the Roman Empire. Do not forget the floods that are reported in the Greek Mythology, Ogygos, Pyrrha and Deucalion and/ or the Bible [Noah's deluge] that brought an unexpected end to all civilized activity of the known world of the respective times. Human activity, as it is a custom to use construction material existing in the vicinity to build new temples and buildings after new settlers arrive in a destroyed area. It did happen at the Pyramids of Egypt that once were covered by lime. As it happened with the ruins of the ancient Greek temples that the original material was used to build the temples of the new religion [Christians]
Ceramics from archaeological sites are often broken when they are discovered for several reasons, archaeologists are frequently uncovering the remains of things that have been thrown away, so often they were broken before they were discarded by their original owner and became buried in the ground. Where these things were originally buried complete, over time the effects of the weather and other natural processes, such as root growth and animal disturbance leads to their decay and they become fragmentary. Where pots are found complete it tends to be at sites which were abandoned suddenly, where people left their possessions behind, or in burial contexts where new items were deposited and left undisturbed.
An archaeological horizon is a common set of artefacts which identifies a culture, is distributed widely over a number of sites, but is restricted to a single layer.
The National Park Service (NPS) is responsible for the management and protection of archaeological and historical sites in the United States. The NPS works to preserve these sites and make them accessible to the public for educational and recreational purposes.
Archaeological Resources Protection Act of 1979 (A+)
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There are many archaeological sites in Australia. See the related link for more details.
the study of animal bones from archaeological sites
There are many such sites in the UK
Two of the most famous archaeological sites in Egypt are the Great Pyramid at Giza and Amarna, the ruined capital of the heretic pharaoh Akhenaten.
In Archaeology Forensic Pathologist examine bodies or human remains found at the site, determine the cause of death and how, why they buried. This may explain the fate of the site or the even its purpose.
The name for the type of anthropologist who examines human remains from archaeological sites is a physical anthropologist.
well there are so many that no they are one of the dig sites selected
Ceramics from archaeological sites are often broken when they are discovered for several reasons, archaeologists are frequently uncovering the remains of things that have been thrown away, so often they were broken before they were discarded by their original owner and became buried in the ground. Where these things were originally buried complete, over time the effects of the weather and other natural processes, such as root growth and animal disturbance leads to their decay and they become fragmentary. Where pots are found complete it tends to be at sites which were abandoned suddenly, where people left their possessions behind, or in burial contexts where new items were deposited and left undisturbed.
You can learn to learn.
An archaeological horizon is a common set of artefacts which identifies a culture, is distributed widely over a number of sites, but is restricted to a single layer.
the important archaeological sources of studying history include monuments and sites, inscriptions, edicts, tools, and weapons and cultural evidences.
the important archaeological sources of studying history include monuments and sites, inscriptions, edicts, tools, and weapons and cultural evidences.