Figure 4 | Scientific Reports

Figure 4

From: Potential utility of reflectance spectroscopy in understanding the paleoecology and depositional history of different fossils

Figure 4

X-ray diffractograms of different specimens of Alveolina (a), Discocyclina (b), Nummulites (c), brachiopod (d), cephalopod (e), bivalve (f) and gastropod (g) are presented in this figure. Calcite (Cal) is detected as the main constituent for fossil shells of Alveolina to cephalopod (a–e). Also, two peaks of Fe oxide (Hematite marked by H) and hydroxide (Goethite marked by Go) are detected for the same fossil groups (a–e), whereas bivalve (f) and gastropod (g) are consisting of aragonite (Ara). Also, four peaks of Fe oxide (Hematite marked by H) and hydroxide (Goethite marked by Go) are detected for the same fossil groups (e,f). Minor Siderite peaks (S) are identified as traces in bivalve specimens. Mixed phases of Ca–Al–Fe silicate hydroxide hydrate are present in all the shells and marked by an asterisk (*).

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