Info

Fern-spore spike

No

Yes

Yes (13)

Yes

Yes

Iridium anomaly

No

1.04 ppb

Yes (13)

11.4 ppb

Yes (amount unspecified)

Claystone layer

No

Yes

Yes

Yes

Yes

Shocked minerals

Yes (9)

Yes (9)

Yes (9)

No

No

Magnetostratigraphy

Yes(10)

Yes (10)

Yes (10)

No

No

Radiometric dates

Yes(11)

Yes (11)

Yes (14)

Yes(11)

Yes(11)

K vertebrates below

Yes

Yes

Yes

Yes

Yes

T vertebrates above

No

No

No

No

No

K leaves below

No

No

No

No

No

T leaves above

Yes(12)

Yes (12)

Yes (12)

No

No

Locality name

(36) Billy Creek

(37) Rick's Place

(38) Iridium Hill

(39) Lerbekmo

(40) Seven Blackfoot

Latitude

47° 32' 25" N

47° 31' 47" N

47° 31' 36" N

47° 36' 42" N

47° 26' 56" N

Longitude

106° 20' 43" W

107° 00' 27" W

107° 12' 41" W

106° 54' 42" W

106° 24' 48" W

County

Garfield

Garfield

Garfield

Garfield

Garfield

State/Province

Montana

Montana

Montana

Montana

Montana

Country

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