POLLEN AND PHYTOLITH ANALYSIS IN THE WILLAMETTE NATIONAL FOREST (SITES 35LA190, 35LA902, AND 35LA46) , OREGON

Companion pollen and phytolith samples were examined from the Olsen #1 Rockshelter (35LA190), Lahar Rockshelter (35LA902), and Brock Meadow (35LA46) . In the Olsen #1 Rockshelter samples were examined from the shallow deposits to provide information concerning prehistoric vegetation. Modern surface samples from the woods and meadow were examined to provide controls. Two groundstone samples also were examined to identify any evidence of utilization of these tools. At the Lahar Rockshelter only a single piece of groundstone was examined for evidence of economic activity. At Brock Meadow samples were collected stratigraphically from sediments to identify any changes in vegetation through time and to assess the pollen record for preservation.本研究对奥尔森1号岩棚（Olsen #1 Rockshelter，编号35LA190）、拉哈尔岩棚（Lahar Rockshelter，编号35LA902）以及布罗克草甸（Brock Meadow，编号35LA46）的伴生孢粉（pollen）与植硅体（phytolith）样品开展了检测分析。针对奥尔森1号岩棚的浅部沉积样品进行检测，以获取史前植被相关信息；采集林地与草甸的现代地表样品作为对照样本开展检测。同时对两件磨制石器（groundstone）样品开展检测，以识别该类工具的使用痕迹证据。仅对拉哈尔岩棚出土的一件磨制石器开展检测，以分析其经济活动相关痕迹证据。在布罗克草甸，通过地层学方法从沉积物中采集样品，以厘清植被随时间的变化情况，并评估孢粉记录的保存状况。