Of particular interest is the steep angle of the strata .
特别使人感兴趣的是地层所形成的陡峭角度。
It could also hover down a cliff face to examine geological strata .
它还可以延着悬崖壁悬浮向下移动做地层检查。
Those strata are laid down every season , like tree rings , bush explained .
布什先生解释道,这些地层每个季节都会被留下,像树木的年轮一样。
The finger bone was found in strata dated to between 48000 and 30000 years ago ( the bone itself has not yet been dated ) . That means the creature was contemporary with both neanderthals and modern humans in the area .