00000nam 2200000zi 4500 9.917028 CaOODSP 20251031142448 m o d f cr mn||||||||| 221108t20212021onca ob f000 0 eng d CaOODSP eng rda CaOODSP M183-2/8792E-PDF Gallotta, C. (Carlo) author. Evaluation and optimization of acid processing procedures for the extraction of conodont elements from calcareous rock / C. Gallotta, S.A. Gouwy, and L. Komaromi. [Ottawa] : Geological Survey of Canada, 2021. ©2021 1 online resource (42 pages, 6 unnumbered pages) : illustrations (some colour). text txt rdacontent computer c rdamedia online resource cr rdacarrier Open file, 2816-7155 ; 8792 Includes bibliographical references (pages 24-25). "The purpose of this study was to identify alternative methods which would improve current conodont processing times and cost at the GSC-Calgary paleontology lab. Conodont processing consists of several stages, most of which are completed within a single day. Acid digestion, however, is the longest processing stage and is also conveniently the most variable in terms of processing techniques. Therefore, this is where this study seeks to improve. The current sample digestion technique utilizes an acetic acid solution which take a notably long time to completely process samples therefore, investigation into quicker techniques commonly used in other labs utilizing formic acid were explored. Formic acid processing improved digestion time to 3 days compared to acetic acid processing's maximum of 56 days. Processing cost results favored acetic acid which totaled $126.41 for full processing of 2.5kg samples, compared to formic processing cost of $101.73 for 1.0kg of sample which theoretically totals $127.99 per 2.5kg of sample. Lab productivity significantly improved using formic acid, capable of producing 350 samples per year opposed to 195 samples processed via acetic acid. Observing extracted specimen under a scanning electron microscope showed no difference between the processing methods. Both methods could produce pristine sample quality which was completely indistinguishable. Based on these findings, the formic acid processing method can be used as a viable technique for the extraction of conodonts from calcareous rock and should be offered as a fast-track, but slightly more expensive alternative for sample processing"--Abstract, page 3. Conodonts Collection and preservation. Carbonate rocks. Acetic acid. Formic acid. Conodontes Collections et conservation. Roches carbonatées. Acide acétique. Acide formique. Geological Survey of Canada, issuing body. Open file (Geological Survey of Canada) 8792. (CaOODSP)9.506878 PDF 4.08 MB https://publications.gc.ca/collections/collection_2023/rncan-nrcan/m183-2/M183-2-8792-eng.pdf HTML N/A https://doi.org/10.4095/328273