Lithostatistical variability of beach gravels along the Polish coast of Baltic Sea

Contribution of petrographic groups along the shore collected in the middle part of the beach; the Zingg-based grain shape parameters obtained during laboratory measurements.
Gravels with a dominant grain size diameter of 2–5 cm collected from the berm (or beach face) of dune and cliff sections of the Polish seacoast. The beach gravels were collected at a radius of about 50 m, along 250 m intervals of the coastline. Individual samples weighed from 2 to 5 kg and were sampled in 10 × 10 m squares. If the amount of collected material was above 2 kg, the sampling procedure was finished; if <2 kg, then the sampling area was expanded to 50 × 10 m rectangles.

在海滩中部采集的沿岸岩石学群组的贡献；在实验室测量中获取的基于 Zingg 的颗粒形状参数。主要粒径直径为 2-5 厘米的砾石，来自波兰海岸沙丘和悬崖部分的堤岸（或海滩前沿）。海滩砾石在距离海岸线约 50 米处，每隔 250 米采集。单个样品重量在 2 至 5 公斤之间，并在 10×10 米的正方形区域内采集。若采集的物料重量超过 2 公斤，则采样程序结束；若不足 2 公斤，则扩大采样区域至 50×10 米的长方形。