slide1 ==> 5.1: Trees were knocked down and burned over hundreds of square km by the Tunguska meteoroid impact
slide2 ==> 5.2: The impact of an iron asteroid 49,000 yr ago produced the 1.2 km diameter Barringer Crater (GSC)
slide3 ==> 5.3: The New Quebec Crater, 1.4 Myr old and 3.4 km in diameter, is now a lake (GSC)
slide4 ==> 5.4: Manicouagan Lake, about 100 km in diameter, is the remmnant of a huge impact 214 Myr ago (NASA)
slide5 ==> 5.5: Abundances (relative to Si) in CI chondrites are the same as in the Sun for almost all elements
slide6 ==> 5.6: Various chondrite families differ somewhat in refractory abundances and probably come from different asteroids
slide7 ==> 5.7: Degree of oxidation of Fe varies enormously among chondrite families, but Fe abundance varies only a little
slide8 ==> 5.8: Most chondrite families are deficient in relatively volatile elements relative to the CI chondrites