Smear slide grain counts from IODP Site 323-U1342 ...

• Main Authors: Aiello, Ivano W, Knudson, Karla P, Ravelo, Ana Christina, Drake, Michelle K
• Format: Dataset
• Language: unknown
• Published: PANGAEA 2021
• Subjects: Bering Sea; Coccolithophores; diatoms; Foraminifera; grain counts; iron fertilization; laminated; North Pacific; Sediments; smear slide; sponge spicules; Event label; Sample code/label; Sample type; Depth, top/min; Depth, bottom/max; AGE; Diatoms, pennales; Diatoms, centrales; Calcareous spicules; Radiolarians; Silicoflagellates; Coccoliths; Volcanic components; Clay; Opaque minerals; Siliciclastics; Total; Run; Sample mass; Size fraction; Standard deviation; Size fraction mode size; Drilling/drill rig; see abstract; Exp323; Joides Resolution; Pacific
• Online Access: https://dx.doi.org/10.1594/pangaea.933699; https://doi.pangaea.de/10.1594/PANGAEA.933699

Here we present new grain count data from from Integrated Ocean Drilling Program (IODP) Expedition 323 Site U1342 Holes A, C, and D. New records of sediment composition from laminated and non-laminated were determined from smear slide (quantitative grain counts) and particle size analyses. A subset of samples from three laminated intervals (672-697 ka, 826-836 ka, and 847-851 ka) and four adjacent massive intervals (668-671 ka, 822-825 ka, 803-845 ka, and 853-856 ka) were selected for analyses. Sediment smear slides were examined with a transmitted light petrographic microscope equipped with a standard eyepiece micrometer. Biogenic (pennate and centric diatoms, silicoflagellates, sponge spicules, foraminifers, and coccolithophores), mineral (clay minerals, silt- to sand-size siliciclastics), and volcaniclastic components were identified and their percentage abundances were visually determined under a petrographic microscope using a 40X objective and 10X eyepiece. For each sample, 3 counts were done on ...