Filter by:

Limit to items where the date of the news item:
Date range
Limit to items where the date of the news item:
Limit to news where the title matches:
Limit to news items tagged with one or more of:
Limit to news items where the audience is one or more of:
Thursday, May 24, 1990

Volcanoes and the oceanic crust

Specific gravity 2.9 – 3.4

Oceanic crust is dark coloured lava, containing large quantities of iron and magnesium. The iron and magnesium content makes the lava weather easily and gives oceanic crust a greater specific gravity than continental crust. The lavas are fluid and the volcanoes have low angles (sheild volcanoes) – examples in Hawaii and Iceland.

Thursday, May 24, 1990

The Tar Creek time bomb

Richard E. Meyer, Picher, Okla. from the Los Angeles Times

Acid water from abandoned mines creates peril for thousands in four southern states.

Water boiled out of a red wound in the pasture and spilled across the grass. It flecked the ragweed with rusty foam. George Mayer knew in an instant what it was.

"The damn mines," he said to himself. "The mines are full, and the water’s finally coming out."

Thursday, May 24, 1990

The story of anthraxolite

Brian Bell, Brent Duse and Tim Venne
Chelmsford Valley District Composite School
Sudbury Region

H.H. Helmstaedt. W.A. Gorman & S.L. McBride, Department of Geological Sciences, Queen’s University, Kingston, Ontario, Canada, K7L 3N6

With proper acknowledgement all diagrams may be reproduced for teaching purposes.