Info

Fern-spore spike

No

No

No

Yes (8)

No

Iridium anomaly

No

No

No

No

No

Claystone layer

No

No

No

No

No

Shocked minerals

No

No

No

No

No

Magnetostratigraphy

No

No

No

Yes (8)

No

Radiometric dates

No

No

No

No

No

K vertebrates below

Yes

No

No

Yes

Yes

T vertebrates above

No

No

No

Yes (8)

No

K leaves below

No

No

No

No

No

T leaves above

No

No

No

No

No

0 0

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