UPPER CRETACEOUS. 169

THICKNESS
IN Feer.
different samples vary slightly in color, some having a

bluish-gray tinge, and others a dark brownish tinge. The

lower samples become slightly less argillaceous. Finely

comminuted shell fragments occur in sample No, 54...... 265- 365
68-74. Gray, calcareous, glauconitic sand, slightly argillaceous in

upper samples, becoming coarser and very glauconitie in
lower Bamplées 556-205 eae ia ee 865- 400

   
     
     
 

Section of well at Fort Caswell, near the mouth of Cape Fear River,
N. C., from samples furnished by the officer in charge:

THICKNESS
Pleistocene; IN Fert.
1. Loose beach sand with small shell fragmenta. ses 0- 30
2-8. Gray, calcareous, sandy clay with well-preseryed Pleisto-
cene fossils, Barnea, Crepidula, NGS88Q,.' Ct ses os a 30- 45

4-6. Loose, calcareous sand with numerous shell fragments
and in sample No. 6 large fragments of Pleistocene
fossils as follows: Cardium, Teredo, Ostrea, Scutella,
Crepidula. Also, in sample No. 6, pieces of calcareous
sand-rock, fragments of peat, iron crusts, and one frag-
ment of crystalline rock, probably granite............ 45- 78.

Eocene: -

7-25. Consists principally of yellow, calcareous, fossiliferous
sand, with some clay. Sample No. 11 consists of white
chalk-like rock (thickness 4 inches)................. 78- 254

Cretaceous: ‘

Peedee sand: 2

26-33. Gray, very calcareous clay, with an admixture of soft
sand in last two samples. Serpula casts in sample

NO. Soo sadn oF gts sim Canis soo cee eg ee tke oes ee ape ... 254- 418

84. Gray, calcareous, very glauconitic sand................ 418- 419

35-46. Gray, calcareous clay, slightly sandy in some samples... 419- 678
46%. Mixture of gray, calcareous clay, sand and fragments of

shells; containing eg ote Ostrea fragments, ete..... 678- 680

40: Sample: mieeinig 66 ss So aa sk oes a eee 680- 690
48-4814. Same as No. 4614, but contains agers. lime concretions
as large as 1 inch in diameter, Contains Bryozoa, Os-

‘trea sp., CCE; an ta ee es Weis courte eer evsess. + 690- 693

49-55%. Gray, argillaceous, calcareous sand, with numerous small

shell fragments. No. 50 contains fragments of gray,

ealeareous sand-rock. Samples 55 and 5514 contain

O86 06 BD CER As i ios Gi i an ag ss Dee eas SORES 693- 795
56-57. Dark green, very glauconitic, calcareous sand........... 795- 880 _
58. Mixture of chunks of dark green, glauconitic sand, and
PYGS; “COICRPOOUS BAIN oi e.g ca eS ke cece d se NES Css 880- 896.
59. Coarse, gray sand, with small shell fragments.......... 896- 899

5914. Light gray, argillaceous limestone, with casts of pelecy-

pods and gastropods. Contains Cardium sp., Lunatia
sp., ete. Teale He doce: cette wep ed se ee eases seeeeess 896- 899 -