James City-area historical tornado activity is slightly below Pennsylvania state average. It is 37% smaller than the overall U.S. average. On 5/31/1985, a category F4 (max. wind speeds 207-260 mph) tornado 9.9 miles away from the James City place center killed 4 people and injured 40 people.
Maasai - Age-sets. Introduction. The basic Maasai political and social structure is their rigid system of age-sets (or age grades; strictly-speaking, an age-grade is a stage within the age-set). These apply primarily to men; women automatically become members of the age-set of their husbands. Under this system, groups of the same age (give or take five years or so) are initiated into adult life during the same period. The age-set thus formed is a permanent grouping, and lasts throughout the life of its members.
The formula for calculating absolute age of a layer by this method of counting is: Absolute age in years (A) = time elapsed since the formation of the most recent layer (R) plus (the number of layers (N) lying above the layer in question multiplied by the duration (D) of the depositional cycle). A = R + (N x D)