Glauconite forms abundantly within the Paleogene warm climatic intervals. However, the role of warm climate on glauconitization is yet to be explored. Glauconitic shales are ubiquitous in transgressive shallow marine deposits of Cambay, Kutch, Jaisalmer, and Barmer basins at the western margin of India. Although the glauconite is most abundant in upper Paleocene-lower Eocene sedimentary deposits in these basins, it also occurs within the middle Eocene and upper Oligocene successions. High-resolution biostratigraphic data, integrated with carbon isotope signatures, demarcate the Paleogene hyperthermal events and reveal an exceptionally high abundance of glauconite corresponding to the warming events. Glauconite occurs as pellets and infillings within the pores of bioclasts, although they differ in chemical composition. The glauconite pellets show variable K₂O content, ranging from 4 to 8 wt% with moderately high Fe₂O₃ (>20 wt%), representing the entire maturation spectrum. Glauconite marking the Paleocene-Eocene transitional sediments is distinctive by the high Al₂O₃ content (>10 wt%), while those within the middle Eocene and Late Oligocene show considerably low Al₂O₃ (<8 wt%). The glauconitic shales often show minor bioturbation and are rich in rectilinear benthic foraminifera, indicative of the oxygen-depleted bottom-water conditions. The unusual composition of upper Paleocene-lower Eocene glauconites relates to their formation within kaolinite substrates during the extremely warm climatic interval. Contrary to this, during the middle Eocene and Late Oligocene, the waning phase of Paleogene warm climatic conditions, glauconite formed by the initial authigenic precipitation of Fe-smectite/ Fe-Al-smectite and its subsequent maturation. The warm climatic condition enhanced the precipitation and runoff, which supplied enhanced nutrients including K, Fe, Al, Si, and Mg into the shallow marine environment, facilitating prolific organic growth and enriching the seawater with cations. The decomposition of organic matter might have resulted in an oxygen-depleted bottom water condition, which was suitable for the mobility and fixation of iron into the glauconite structure. The glauconite formed abundantly during hyperthermal events because of the convergence of favorable factors such as rapid transgression, reduced sedimentation rate, warm seawater condition, enhanced continental weathering, and enhanced supply of nutrients favoring dysoxic shallow shelves. However, rapid and extreme hyperthermal events such as PETM inhibits glauconite formation.

海绿石在古近纪温暖的气候区间内大量形成。然而，温暖气候对青光石化的作用仍有待探索。在印度西部边缘的坎贝、库奇、贾沙梅尔和巴尔默盆地的海侵浅海沉积物中普遍存在海绿石页岩。虽然海绿石在这些盆地的上古新统-下始新统沉积物中最为丰富，但它也出现在中始新世和上渐新统序列中。与碳同位素特征相结合的高分辨率生物地层数据划分了古近纪高温事件，并揭示了与变暖事件相对应的异常高丰度的海绿石。海绿石以颗粒和填充物的形式出现在生物碎屑的孔隙中，尽管它们的化学成分不同。₂ O 含量，范围从 4 到 8 wt%，具有中等高的 Fe ₂ O ₃ (>20 wt%)，代表整个成熟谱。标志着古新世-始新世过渡沉积物的海绿石以高 Al ₂ O ₃含量（> 10 wt％）为特征，而中始新世和晚渐新世中的海绿石显示出相当低的 Al ₂ O ₃(<8 重量%)。海绿石页岩通常表现出轻微的生物扰动，并且富含直线型底栖有孔虫，这表明底水条件是贫氧的。上古新世 - 下始新世海蓝石的不寻常成分与它们在极端温暖的气候间隔期间在高岭石基质内的形成有关。与此相反，在始新世中期和渐新世晚期，古近纪温暖气候条件的减弱阶段，由铁蒙脱石/铁铝蒙脱石的初始自生沉淀及其随后的成熟形成海绿石。温暖的气候条件增强了降水和径流，为浅海环境提供了更多的营养物质，包括 K、Fe、Al、Si 和 Mg，促进了多产的有机物生长，并使海水富含阳离子。有机物的分解可能导致底水缺氧状态，这适合铁迁移和固定到海绿石结构中。由于快速海侵、沉积速率降低、温暖的海水条件、大陆风化增强以及有利于缺氧浅陆架营养物质供应的增加等有利因素的汇聚，海绿石在高温事件期间大量形成。然而，PETM 等快速和极端的高温事件会抑制海绿石的形成。由于快速海侵、沉积速率降低、温暖的海水条件、大陆风化增强以及有利于缺氧浅陆架营养物质供应的增加等有利因素的汇聚，海绿石在高温事件期间大量形成。然而，PETM 等快速和极端的高温事件会抑制海绿石的形成。由于快速海侵、沉积速率降低、温暖的海水条件、大陆风化增强以及有利于缺氧浅陆架营养物质供应的增加等有利因素的汇聚，海绿石在高温事件期间大量形成。然而，PETM 等快速和极端的高温事件会抑制海绿石的形成。