Alluvium: Clay, silt, sand, gravel, or similar unconsolidated sediments deposited by flowing water. (Wikipedia link for Alluvium)
Aquifers: Underground layers of permeable rock, sand, or gravel that contain or transmit groundwater. (Wikipedia link for Aquifer)
Batholith: A large mass of intrusive igneous rock that forms from cooled magma deep in the Earth's crust. (Wikipedia link for Batholith)
Bedrock: The solid rock underlying loose deposits such as soil or alluvium. (Wikipedia link for Bedrock)
Crystalline Igneous and Metamorphic Rocks: Rocks formed from the cooling and solidification of molten rock (igneous) or by the transformation of existing rock types by heat, pressure, or chemical alteration (metamorphic), often with a crystalline structure. (Wikipedia link for Igneous rock,Wikipedia link for Metamorphic rock)
Drumlins: Streamlined, elongated hills composed of glacial till, shaped by the movement of glacial ice. (Wikipedia link for Drumlin)
Glacial Abrasion: The erosive process where ice, often carrying rocks and debris, grinds against and polishes underlying rock surfaces. (Wikipedia link for Glacial abrasion)
Glacial Erratics: Large boulders transported and deposited by glaciers, often different in composition from the underlying bedrock. (Wikipedia link for Glacial erratic)
Glacial Lakes: Lakes formed as a result of glacial activity, often from meltwater dammed by ice or glacial deposits. (Wikipedia link for Glacial lake)
Glacial Plucking: The process by which glaciers erode rock by freezing onto loose fragments and then pulling them away as the ice moves. (Wikipedia link for Glacial plucking)
Glacial Striations: Scratches and grooves left on rocks by glacial abrasion, indicating the direction of ice movement. (Wikipedia link for Glacial striation)
Glaciers: Large, persistent bodies of dense ice that are constantly moving under their own weight. (Wikipedia link for Glacier)
Meta-sedimentary Rocks: Sedimentary rocks that have been subjected to metamorphism, altering their original structure and mineralogy. (Wikipedia link for Metasedimentary rock)
Metamorphic rock: Rock formed by the transformation of existing rock types by heat, pressure, or chemical alteration. (Wikipedia link for Metamorphic rock)
Milford-Dedham Zone: A specific bedrock formation mentioned in the document. (Wikipedia link for Nashoba Terrane - The Milford-Dedham zone is part of the larger Nashoba Terrane)
Narragansett Basin: A geologic basin located in southeastern New England, characterized by meta-sedimentary rocks. (Wikipedia link for Narragansett Basin)
Organic Sediments: Sediments primarily composed of decomposed plant and animal matter, often found in wetlands. (Wikipedia link for Organic matter)
Outwash: Stratified (layered) sand and gravel deposits laid down by meltwater streams flowing from glaciers. (Wikipedia link for Outwash)
Peat Deposits: Accumulated organic matter (decomposed plant material) that forms in waterlogged conditions, characteristic of bogs and swamps. (Wikipedia link for Peat)
