Since that discovery,O’Shea and Meadows have worked on identifying human campsites,which are typically located away from hunting areas.On their 25foot boat,the researchers first spotted the ancient wood object using a small piece of equipment with a camera.Then a team of divers—including O’Shea—went down about 100 feet to get it.
The wood’s age has now been fixed by means of carbon dating.It is currently undergoing more detailed analyses to determine whether there has been human modification,which visual examination suggests.“The first thing you notice is that it appears to have been shaped with a rounded base and a pointed tip,”O’Shea said.“It must have been created.It looks like it might have been used as a tent pole or a pole to hang meat.”
In addition to the wood,the researchers have collected many other samples from the bottom of the lake.O’Shea and his colleagues will need to wait for calmer weather before they can resume their search for evidence of human life under the great lake.
考古学家们的新发现有望印证远古人类从游猎文明到农耕文明的转变。
1.During the mysterious period mentioned in the passage, the Lake Huron area________.
A.was deserted by ancient Indians
B.witnessed the start of agriculture
C.was taken up by large animals
D.began to be covered by water
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