During the Pleistocene Epoch approximately 13,000 years ago, retreating glaciers deposited several stranded icebergs where the wetlands on the north end of the North Seattle College campus lie today. We collected and analyzed several borehole samples within the Meridian Avenue Basin to determine the stratigraphy and identify organic material found within the basin. The stratigraphy of the basin revealed that these features are a result of Vashon Glaciation during the end of the Pleistocene Epoch. Our subsurface core samples exposed a glacial till-lined basin ranging from 3-9 meters deep with overlying layers of gravelly clay, silt, sand and peat. A carbon date we retrieved from organic material within the peat indicates the sediment was deposited during the last glacial recession. The fill of the Meridian Avenue Basin and the carbon date retrieved indicate that it was created by an iceberg stranded in a shallow, post-glacial lake during the last ice age. Unlike typical kettle basins, load-induced subsidence of this iceberg into saturated lake-floor sediments created its shape and depth. The basin lacks the characteristic outwash depositions seen in kettle lakes and appears to be unique, suggesting the geologic processes which may have created the basin seldom occur and are poorly understood. Researching the origins and stratigraphy of the Meridian Ave basin will help advance knowledge of this possibly rare periglacial phenomenon.