s 
LOWER CHALK—MICROGRAPHIC STRUCTURE. 
no * t 
V 3 © 
95 
oftt! 
■h m O 
cfl a) ^ 
• 32 © 
©-^-£ 
3>afS 
§ s © 
p*S s 
CO c /2 © 
CP 
*-< S-. 
a? a> 
t?32 32 
cC -^.-g 
"S c © 
■^> •« 
'OiS 
£9 
£ 
|isl 
(DoS 
C-i S-i , ' H 
© cS 
3=23 O 
oo 
CB © 
CO CD 
-£ Ch 
C/2 
c« > 
o ^ 
—< CD 
c« 7* 
<u ,c 
2 
85 
^.s’S 
‘SS-s 
o x 
•§M 
"■* _ *» 
. 32 © 
>> o 
^ 3 S 
^ss 
© 
Jg'-I 
P<l3 H 
C/2 
if © 
TT cn 
tT © 
s © 
4; a> 
+3 
a 
S qj 
C-g 
a) CS 
CD O 
f-i O 
bO 3 
cj 
4- 33 
o so 
co 
C o 
58 © 
t-4 £ 
<D ^ 
^32 
S3 O 
M- 
S5 3 
S-g 
is £ 
s~* 
o **-• 
ds o 
33 « O 
r—t 
O u M 
50 O . 
sea 
'o' a? to > © T3 
-^32 © £5 fi 5 ^ 
°co i? C* <w C eS -g 
aCS<lo“0 
g © w PS 
^ <8 © ^ 
S _, is p 22 _p -i 3 > 
- J* 3 0$ ft 14 
3 -g g°S o «-g 
•5-8 £ 8 j§ 
33 3-2 a 
X 'f 3 ° be.© 
© Pt*" -1 © S3 "*3 +3 
u - t ; c5 ^ ® 
©g>!'g^ 
.3 o « «>9 
^ r_1 S CO CO 
2 G .5 I g . 
p’~ ©.S-g © 
CQ ^ ' n - ^ 
<tf <0 
PS.©. 
.5 a 
3 8 
eS 
" S S C !n O S ^ 
sSstf-sasei 
r C ih' 2<!'!S ®"r 
§fe.Sg'G°©e 
o % m „Q 
*/•»>! CQ q 
A S.h ^ ^ S- 
g 5 02 rO Vft'S.S ® 
2 © • §>.3 32 22 
«•?* g'Sjj 
^ O 2 > ic - ” c 
§■?« a Ss & h-5 
r O'23 © > to p W g 
ra^sIg'pjS'gg 
© C2 «g §.g © £ ° O 
cS g O © g ^ 
to © « co co „o)> 
£ 2 T2 43* > C s’© ©-73 
goa -2 g » " 
©g^-S^S. 0 * 
5.§5!'!l|l| 
<HtHfci S-'--'S^^ 
«—I ,*1 —4 jPj rc ni 'Cc 
S © to 
g > to 
©On 
t-, ’g 
© >■£ 
a> rt 
it 
rH 
c 8 
^ T\ 
£*a a 
2 aS 
s © o 
'O 
o 
a © 
2 ©5 
3 3fl 
4 08 .. . 
© 
(H O 
o © 
315 
o; a n • 
—a *0 -4^ feD 
68 © a cs 
32 cS fc4 
5 o*~ 
eS o © 2 
O +2 32 
S cS 3 “ 
^ « ,E C2 
gs: S£ 
*3 ^ 
S 
^ o £ 
vi £ 
>^5 
a) m-h ^ 
ss P c g 
^ o O 0 
CD 
C/2 O rn 
a a t- .o 
rO ,-T S-i 
a© a 
•g-Sw 
C/3 03 
a £ a 
p © s 
© ° 1o 
§.5 © 
3< 32 co 
M © ® 
-P C« 
k, tc 
> O 
© -h 
■M T3 
P 
©S ^ 
C/3 CO 
^ -h £> • 
flrC r-P 
iS £ &o 
<D 
O 
ic 
co 
to 
Tti 
eS * 
g 
3 
•H 
- a to 
58 bC o ~ 
P ^ o S 
^ *&-i P ^ 
g ^^.2 -p;^ 
S o © s ^ 43 
3 c 5 sS'd O 
N e<! x S3 g .2 
• 2 ^ g © U P, 
£3 H <j H e-< O co 
g - cs 
III, 
!?• 
I' 
jl 
, S KS 
;fQcb 
a 
3 
a 
bo 
e 8 
. Ui 
c6 32 c8 2 •»-- 
a fa-g i 8 g» 
22 O 2 s 43 
c 8 68 " 
cf’§ •- 
58 c8 - 
-s' j'"?— ^ ^ 
50 58 g —i p 
C -2 -2 
"o ci -8 ’PS a 
•2.33 X 
23 u © c8 3 
gHHOW 
--T ©" © 
c8 *-j *3 
a co *33 
p © c 8 S 
© 5 3 « 
S s 42 o 
Cd C ^.£ 
© © 
0> 
s a 
"£ 
O ^ Q 
O 0) 
o 
2 a 2 
c 
rt S O 
o 
U 
HH 
4i ® 
JP 
0+^0) 
■s ’3 
© ^ S_j 
tsd ia o © a 
o-Wfl 
ft 
-a> o 
ll 
2 |-| 
-sJCQ^I 
«4-< 
CO 
1 ! 1 1 
tO 
1 
O 
1 1 
1 
1 
iO 
1 o 
o * 
CM 
CO 
\£0 
2 ^ 
x43^ 
°^42 
S 
2 -sa 
o 
iO 
to 
to 
rH 
<P 
p 
P 
rH 
oo 
o 
00 
CO 
o 
rH 
CM 
O 
<M 
I 
rH 
CM 
1 
S3 
S3 
S3 
. fe CQ 
^4?© ps 
-4ft> 
+-> 
f-t 
JH 
t* 
Jh K ^ c3 
<?5 
c8 
£8 
c« O h 
P 
P 
3 
S wC8 tq, 
O' 
<y 
G? 
O' 
grey - 
Dark 
grey. 
>> 
<D 
IH 
fee 
grey 
(M 
CO 
rH 
C3 
O 
P 
rH 
J>- 
rH 
<b 
03 
rH 
00 
ss 
rH 
to 
CO 
rH 
O 
rH 
£> 
05 
rH 
00 
(M 
o 
CO 
rH 
rH 
rH 
o 
00 
03 
rH 
C3 
to 
CO 
00 
(M 
O 
88 
CO 
o 
O 
o 
CO 
JU- 
Ml 
tH 
Ip 
o 
*H 
rH 
r** 
CM 
!>* 
CO 
co 
CM 
CM 
rH 
00 
CO 
to 
Cl 
• 0) 
to o 
iO 
tH fl 
0*2 
w-g 
p 
^ s_- 
O © s- 
© © ^ 
321 p;^ 
w 
T- 
CO 
00 
CO 
