along this zone, there is another rock type, volcanic rock. it is serpentinite. it is a very treacherous rock. if you go up market, you will see it where the met -- barack is exposed in that cut. -- for rock that is exposed in that it is cut. it can be hard work and have the consistency of soap and just slides. why is it like that? it is an intrusion. it is like toothpaste that was extruded through a crack in the earth. that means it was a sheer zone or fault, hundreds of millions of years ago, where it actually came up through and bubbled out and formed this band of serpentinite. adjacent to that is this wonderful rock. what is the other thin that is bad about serpentineite? it contains naturally occurring asbestos, which is a carcinogen, known carcinogen. if you go to where st. mary's cathedral is, cathedral hill, that is one of the outcrops. there is a high percentage of serpentinite in the rock. in the old days, the 1930's, 1920's, san franciscans to not bother to deal with the disposal companies. they would take their garbage out the other side of twin peaks,

the volcano begin erupting and flooding near the volcano is now a concern because of the volcanic rocks fallen into rivers. >> this morning, a series of aftershocks. >> brought down more buildings in the new zealand city of christ church. it six miles from the city's center followed by a 6.0 quake an hour later. they say the duel aftershocks injured several people and broke water lines and destroyed two buildings including what was left of the famed saint john's church. they are most powerful since the earthquake in february that killed 181 people and damaged thousands of homes. >>> a piece of history is being released this morning, ones explosive top secret pentagon papers will be released precisely 40 years after they were leaked to the "new york times." all 7,000 pages detailing america's conduct during the vietnam war will be unveiled at the lyndon b.johnson library as well as other presidential libraries including nixon's. most of secrets were spilled long ago but the leak of documents triggered a constitutional crisis over freedom of the press. >>> dallas mavericks are n.b.a. cha

the result of the ash and volcanic rock that's fallen into them.temperature is killing fish. recent heavy rains mean those rivers could soon overflow their banks. >>> two new government warnings on cancer are out. "the new york times" reports scientists have officially listed formaldehyde as a carcinogen. they also question whether styrene in large quantities could be cancer forming. styrene is used in bathtubs, boats, plastic plates and cups. >>> they take wiffle ball seriously in kalamazoo michigan. in the final inning of a game, steve everett risked injury to take away a game-tieing home run. he used a cell phone to call a major league umpire who he knew from town who was away. more than 1500 miles away in california. the umpire conferred with other umpires, the ruling, the monday evening news" with scott pelley. >>> it's about four minutes after the hour. time for another check of the weather with lonnie. hi, lonnie. >> good morning elaine. good morning everybody. i'll start by talking about the hot spots and chilly temps all across the country

. >>> in chile, streaming rivers filled with volcanic ash and rocks are about to flood, after a volcano began erupting there last week. heavy rains are making the problem worse. about 3500 people have been evacuated so far. ash clouds, like you see there, are keeping airports closed in several south american countries. >>> around here, it's looking a little more normal weather wise. >> well, we go from winter back to summer here. i think we kind of skipped spring, as we see patchy low clouds out there this morning, classic summer pattern for the bay. that means cloudy in the morning, with more sunshine headed your way this afternoon. it's already appearing across the golden gate. we'll talk more about your complete forecast, coming up in just a few minutes. >>> also coming up, the bright lights and new game systems at e 3. the hot topics gamers were talking about down in l.a. >>> and the new rookie coach of the warriors says the team will succeed on the court and have fun in the process. kim coyle has all the details. we'll be right back. ,,,,,, jim bernard, thank you. ,,,, ... it's som