皖南西递黟县青工艺石材矿地质特征及成因

“黟县青”是皖南黟县西递特有的一种地方性工艺建筑石材矿，含矿地层为形成于浅海陆架相环境的寒武系大陈岭组，主要产于蓝田向斜盆地内，为受沉积成因控制的大理岩化灰岩矿床，矿体严格受地层产状控制。黟县青石材矿赋矿岩层为深灰色巨厚层纹层状大理岩化微细—细中晶灰岩，因具有高密度、抗风化、抗冻、耐碱、耐水、刚度大于普通灰石、抗变形能力大于混凝土等特性而被广泛应用于徽州地区明清古建筑。燕山期黟县花岗闪长岩体的侵入使灰岩发生大理岩化，对矿石品质的提升起着积极的作用。在矿产勘查的基础上，通过对西递水口亭地区黟县青石材矿成矿地质条件、矿体（矿石）特征和矿床成因的研究，为皖南地区该矿种的勘查、研究和开发利用提供重要的基础资料。     

Possible stellar asterisms carved on a protohistoric stone

Chisel marks on a stone uncovered in Rupinpiccolo protohistoric hill fort from north-eastern Italy were suggested to be a representation of the night sky (Bernardini et al. 2022 Documenta Praehistorica XLIX). The patterns of the 29 marks are analyzed here to establish if they reproduce popular stellar asterisms. Nine marks are found to match the Tail of Scorpius and five the Orion's Belt, together with Rigel and Betelgeuse. Nine marks are found in the approximate position of the Pleiades showing some match with the cluster members. On the back side, 5 marks possibly reproduce Cassiopeia. One mark slightly North of Orion cannot be identified. The 28 marks show a Pearson correlation coefficient $$(28) with stellar positions higher than 0.99 with a probability $$ of a wrong correlation lower than 0.001. Departures are about one degree, or about 7 mm, as the mean diameter of the marks, which suggests a manufacturing limitation in the charting. The fort dates $$1800–400 BCE when Scorpius and Orion showed about the same orientation at the heliacal rising. The unidentified mark challenges the whole picture. We suggest it could have been the progenitor of a failed supernova, thus offering also the possibility of a verification.     

旅游地质新发现--黄果树石林

在黄果树瀑布北约2km处，新发现一片长1－1．5km，宽0．5－0．8km的石林，命名为黄果树石林。贵黄高等级公路通过该石林南侧，交通方便。黄果树石林可作为黄果树景区风景点之一而共同开发。黄果树石林由早三叠世（距今2．4亿年前）浅海中沉积形成的安顺组白云岩组成。形成石林的岩层为厚层块状，发育东西向节理，也有南北向和其它方向的节理，且这套厚层岩石上下均为薄－中厚层状岩石。喜山运动以来的差异风化和溶蚀作用逐渐形成了黄果树石林。     

雨花台砾石层内含辉木砾石的发现及其意义

通过雨花台砾石层内含辉木雨花石的发现,分析了其重要的科研意义和实用价值。指出对雨花石、辉木化石和树蕨三者的深入研究,将有助于全面探讨古长江流域的发育史,进一步弄清地层进代、研究古生侯和古环境