Info

Fern-spore spike

Yes

Yes

No

Yes (18)

No

Iridium anomaly

No

5.6 ppb

1.0 ppb

2.7 ppb

17.2 ppb

Claystone layer

No

Yes

Yes

Yes

Yes

Shocked minerals

No

No

Yes (17)

Yes (17)

Yes (17)

Magnetostratigraphy

No

Yes(16)

No

No

No

Radiometric dates

Yes (11)

No

No

No

No

K vertebrates below

Yes

No

No

No

No

T vertebrates above

No

No

No

No

No

K leaves below

No

No

No

No

No

T leaves above

No

No

No

No

No

[al First discovery of K-T boundary in nonmarine rocks. ^ Also known as Old Raton Pass locality.

Locality name

(46) Dawson North

(47) Crow Creek

(48) Starkville North

(49) Starkville South

(50) Clear Creek North

Latitude

36° 40' 56" N

36° 47' N

37° 07' 15" N

37° 06' 00" N

37° 05' 54" N

Longitude

104° 46' 15" W

104° 38' W

104° 31' 13" W

104° 31' 15" W

104° 31' 13" W

County

Colfax

Colfax

Las Animas

Las Animas

Las Animas

State/Province

New Mexico

New Mexico

Colorado

Colorado

Colorado

Country

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