Info
No
No
Yes
Yes
Yes
Iridium anomaly
1.27 ppb
1.6 ppb (44)
71 ppb
No
0.49 ppb
Claystone layer
No
No
No
No
No
Shocked minerals
No
No
No
No
No
No
No
No
No
No
Radiometric dates
Yes
No
No
No
No
K vertebrates below
Yes
No
No
No
Yes (45)
T vertebrates above
No
No
No
No
No
K leaves below
No
No
Yes
Yes
Yes
T leaves above
No
No
Yes
Yes
Yes
(7) Lerbekmo and Coulter (1984)
(12) Johnson and Hickey (1990)
(14) Baadsgaard and Lerbekmo (1980)
(15) Archibald et al (1982)
(16) Shoemaker et al (1987)
(18) Nichols and Fleming (1990)
(24) Raynolds and Johnson (2003)
(27) Leffingwell (1970)
(29) Sweet and Braman (2001)
(35) Mclver and Basinger (1993)
(36) Sweet and Braman (1992)
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