Geology Reference
In-Depth Information
E. lacustris
cuticle
C
16
FA
o
X
*
_
C
10
_
_
C
18
FA
_
_
C
15
o
o
_
_
o
C
20
o
o
_
_
+
o
o
o
o
_
o
_
_
o
C
16
FA
o
m/z
74+87+85+83
C
18
FA
C
7
FA
C
12
FA
o
C
14
FA
C
10
o
_
o
o
_
+
C
15
_
_
o
o
_
_
_
_
o
_
+
o
_
+
_
_
o
_
o
o
Retention time
Fig. 7.4
Partial TMAH Py-GC-MS chromatogram of
Eurypteruslacustris
cuticle and
m/z
74 + 87 + 85 + 83 mass chromatogram revealing the presence of constituent fatty acyl moieties (o)
with respect to the alkane/alkene homologues. C
n
indicates alkane/alkene or fatty acyl homologue
with n denoting the carbon chain length. X is an unknown compound with mass fragment ions 164
and 193
1580
1350
E. Lacustris
(paddle)
Eurypterid
(Stankiewicz et al. 1998a)
1200
1400
1600
1800
Wavenumber (cm
-1
)
Fig. 7.5
In situ
Raman imagery of samples of cuticles of
Eurypteruslacustris
, Fort Erie Rail cut,
Ontario, Canada, and
Adelopthalmus
sp. from the Joggins Formation, Nova Scotia, Canada, reveal-
ing spectral characteristics of carbonaceous material and, particularly, peaks associated with the
presence of disordered (D; ~1,350 cm
−1
) and ordered (G; ~1,580 cm
−1
) carbon
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