Sinkhole rain. An analysis of a case of sinkhole formation under a retention pond due to a large amount of rain can be seen in a sinkhole collapse study. Sinkholes have been used for centuries as disposal sites for various forms of waste. A consequence of this is the pollution of groundwater resources, with serious health implications in such areas. The Maya civilization sometimes used sinkholes in the Yucatán Peninsula (known as cenotes) as places to deposit precious items and human sacrifices. When sinkholes are very deep or connected to caves, they may offer challenges for experienced cavers or, when water-filled,
Divisions on a Ground of several components of Canadian society identity. I Writing II Teaching III The Social Order Frye, Northrop. "Divisions on a Ground: Essays on Canadian Culture" ed. James Polk. Toronto: Anansi Press, 1982. Divisions on a Ground Divisions on a Ground: Essays on Canadian Culture is a collection of essays by Canadian literary critic Northrop Frye, edited by James Polk and published in 1982. The collection includes lectures, addresses and previously published articles by Frye. "Divisions on a Ground" presents Frye's theorizing about Canada with respect to three main themes: Canadian literary writing, university education in Canada and internationally, and a