Coastal wetlands are seen in the central part of the SW coast of Kerala, India at Muriyad, Thrissur ($\sim$15 km orthogonal to the present day coast towards inland) and form a part of Vembanad kol. These wetlands are sheltered by well-developed beach ridges in the west and lateritic uplands towards east between the latitudes and longitudes of 10°20‘-10°30‘N and 76°10‘-76°20‘E respectively. The present study aims to find the evidences of early Holocene transgression in the area and constrain its chronology using optically stimulated luminescence (OSL) as well as radiocarbon dating. The general stratigraphy of the wetland section shows estuarine sandy clay at the bottom, followed by one meter thick peat unit, overlain by lacustrine clay and colluvial sediments. The fluvial sequences were devoid of peat deposits and comprised of clay and sand sequences having large fossil tree logs. OSL age of a sand layer (7.0 ± 1.0 ka) below the peat unit as well as the radiocarbon ages of peat (between 7920–7740 and 7410–7180 Cal years BP) itself indicates that the unit was formed between 8 and 7 ka BP. The peat accretion shows an average rate of 1.74 mma^-1. The pollen analysis of the peat unit demonstrates that peat was formed from Rhizophoraceae mangrove plants, implying close proximity of the study area to the shore line. Dominance of wet evergreen forest taxa in the non-mangrove pollen of the peat indicates wet climatic conditions in the area. The occurrences of fossil wood stumps in upright position and large tree trunks buried in the fluvial succession show that the trees were buried in-situ in the growth position/ during the transportation by flood waters in the fluvial sequence. The fluvial unit in the wetland stratigraphy shows evidences of enhanced SW monsoon in the area, causing large scale floods, submergence of forests and destruction of large trees during 5710–5610 and 6880–6750 Cal years BP.

沿海湿地位于印度喀拉拉邦西南海岸的中部，位于特里苏尔的穆里亚德（$～$15 公里与现今海岸向内陆正交）并形成 Vembanad kol 的一部分。这些湿地被西部发达的海滩山脊和向东分别位于北纬 10°20'-10°30'和东经 76°10'-76°20'之间的红土高地所庇护。本研究旨在寻找该地区早期全新世海侵的证据，并使用光学受激发光 (OSL) 和放射性碳测年限制其年代顺序。湿地剖面的一般地层显示底部为河口砂质粘土，其次是一米厚的泥炭单元，上覆有湖相粘土和崩积沉积物。河流层序没有泥炭沉积，由粘土和沙层层序组成，具有大的化石树原木。砂层的 OSL 年龄 (7.0 ± 1. 0 ka) 以及泥炭的放射性碳年龄（7920-7740 和 7410-7180​​ Cal years BP 之间）本身表明该单元形成于 8 和 7 ka BP 之间。泥炭增生显示平均速率为 1.74 mma^-1。泥炭单元的花粉分析表明，泥炭是由根茎科红树林植物形成的，这意味着研究区靠近海岸线。湿常绿森林类群在泥炭的非红树林花粉中的优势表明该地区的气候条件潮湿。河流序列中直立位置的化石木桩和大树干埋藏的出现表明树木在河流序列中的生长位置/在洪水运输过程中就地埋藏。湿地地层中的河流单元显示该地区西南季风增强的证据，在 BP 5710-5610 和 6880-6750 Cal 年期间引起大规模洪水、森林淹没和大树破坏。