Core Research Center Core T744

Core Research Center, core T744, from well operated by UNION OILRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "T744", "API Num": "5010320001", "Operator": "UNION OIL", "Well Name": "1 KALUBIK CREEK", "Field": "KUPARUK RIVER", "State": "AK", "County": "HARRISON BAY", "Type": "CUTTINGS", "Photos": "F", "Thin Sec": "F", "Analysis": "F", "Latitude": "70.404971", "Longitude": "-150.070249", "coordinates_geohash": "bst290f4ttzg", "Source": "FROM STATE RECORDS", "Security Flag": "VIEWING ALLOWED, NO SAMPLING UNLESS APPROVED", "crc_collection_name": "core", "sb_parent_id": "4f4e49dae4b07f02db5e0486", "intervals": [{"Formation": "UNKNOWN", "Age": null, "Min Depth": "0", "Max Depth": "0"}],...

Categories: Physical Item; Tags: Poorly consolidated surficial deposits, Quaternary, Pleistocene, and uppermost Tertiary, chert, clay, peat, All tags... sand, silt, Fewer tags

Core Research Center Cutting HH01661

Core Research Center, cutting HH01661, from well operated by HUMBLE REFINING CORaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "HH01661", "API Num": "0102520006", "Operator": "HUMBLE REFINING CO", "Well Name": "1 W D HARRIGAN ET AL", "Field": "WILDCAT", "State": "ID", "County": "CLARK", "Thin Sec": "F", "Analysis": "F", "Latitude": "31.83871", "Longitude": "-87.98264", "coordinates_geohash": "dj9mjuhczvsx", "Source": "FROM STATE RECORDS", "Min": "10700", "Max": "11510", "Security Flag": null, "crc_collection_name": "cutting", "sb_parent_id": "4f4e49d8e4b07f02db5df2d2", "intervals": [{"Formation": null, "Age": null, "Min Depth": null, "Max Depth": null}], "crcwc_url": "https://my.usgs.gov/crcwc/cutting/report/76171",...

Categories: Physical Item; Tags: Alluvial, coastal and low terrace deposits, Holocene, chert, clay, gravel, All tags... marl, peat, sand, silt, Fewer tags

Core Research Center Core E763

Core Research Center, core E763, from well operated by USGSRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "E763", "API Num": "5002320014", "Operator": "USGS", "Well Name": "1 WEST DEASE", "Field": "EXPLORATORY", "State": "AK", "County": "BARROW", "Type": "SLABBED", "Photos": "T", "Thin Sec": "T", "Analysis": "T", "Latitude": "71.15907", "Longitude": "-155.629224", "coordinates_geohash": "bs9kfd478hpd", "Source": "FROM STATE RECORDS", "Security Flag": "VIEWING ALLOWED, NO SAMPLING UNLESS APPROVED", "crc_collection_name": "core", "sb_parent_id": "4f4e49dae4b07f02db5e0486", "intervals": [{"Formation": "UNKNOWN", "Age": null, "Min Depth": "600", "Max Depth": "627"}, {"Formation":...

Categories: Physical Item; Tags: Quaternary, Unconsolidated surficial deposits, undivided, clay, granite, peat, All tags... quartzite, sand, silt, Fewer tags

Core Research Center Core T693

Core Research Center, core T693, from well operated by US NAVYRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "T693", "API Num": "5027920001", "Operator": "US NAVY", "Well Name": "1 SOUTH SIMPSON", "Field": "EXPLORATORY", "State": "AK", "County": "TESHEKPUK", "Type": "SLABBED", "Photos": "F", "Thin Sec": "F", "Analysis": "T", "Latitude": "70.806874", "Longitude": "-154.98184", "coordinates_geohash": "bs9fc3cxvmup", "Source": "FROM STATE RECORDS", "Security Flag": "NO SPECIAL RESTRICTIONS", "crc_collection_name": "core", "sb_parent_id": "4f4e49dae4b07f02db5e0486", "intervals": [{"Formation": "UNKNOWN", "Age": null, "Min Depth": "0", "Max Depth": "0"}], "crcwc_url": "https://my.usgs.gov/crcwc/core/report/15893",...

Categories: Physical Item; Tags: Quaternary, Unconsolidated surficial deposits, undivided, peat, sand

Great Dismal Swamp field measurements for aboveground and belowground biomass

Plot-level field data were collected in the summer of 2014 to estimate aboveground and belowground biomass in the Great Dismal Swamp National Wildlife Refuge and Dismal Swamp State Park in North Carolina and Virginia. Data were collected at 85 plots. The location of the center of each plot was recorded with a Trimble ProXH global positioning system (GPS) and differentially corrected. Data files included 1: GDS_plots.csv, 2. GDS_FWD.csv, 3. GDS_LWD.csv, 4. GDS_Shrubs.csv, 5. GDS_Trees.csv, and 6. GDS_plot_summaries.csv. The data contained in GDS_plot_summaries.csv were calculated from the GDS_plots.csv, GDS_FWD.csv, GDS_LWD.csv, GDS_Shrubs.csv, GDS_Trees.csv files using the R statistical software environment (R Core...

Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Biomass, Botany, Cover, Duff, Ecology, All tags... Forestry, Great Dismal Swamp, Height, Herbaceous, Litter, North Carolina, Peat, Shrub, Soil Sciences, Tree, USGS Science Data Catalog (SDC), United States, Vegetation, Virginia, Fewer tags

Database for the Surficial Geologic Map of the Charleston Region, Berkeley, Charleston, Colleton, Dorchester, and Georgetown Counties, South Carolina

This database portrays the surface and shallow subsurface geology of the greater Charleston, S.C. region east of 80°30′ west and south of 33°15′ north. The region covers the entirety of Charleston County and portions of Berkeley, Colleton, Dorchester, and Georgetown Counties. Units locally exposed at the surface range in age from middle Eocene to Holocene, but most of the area is covered by Quaternary interglacial deposits. These are, from oldest to youngest, the Okefenokee, Waccamaw(?), Penholoway, Ladson, Ten Mile Hill, and Wando Formations and the Silver Bluff beds. Two cross sections (not included in the database), one running southeast from Harleyville to the coastline on James Island and the other running...

Tags: Adam Run fault, Ashepoo River, Ashley Formation, Ashley River, Ashley River fault, All tags... Atlantic Ocean, Awendaw, Back River, Berkeley County, Bethera, Bull Harbor, Captain Sams Inlet, Cenozoic, Chandler Bridge Formation, Charleston, Charleston County, Charleston Harbor, Charleston fault, Clark Sound, College Park, Colleton County, Cooper River, Coosaw River, Copahee Sound, Cordesville, Cottageville, Daniel Island beds (informal), Dawho River, Dorchester, Dorchester County, East Branch Cooper River, Economic Geology, Edisto Beach, Edisto Formation, Edisto Island, Edisto River, Eocene, Esterville Minim Creek Canal, Folly Beach, Folly River, Fort Moultrie, Fort Sumter, Fort Wagner, Four Hole Swamp, Francis Marion National Forest, Geomorphology, Givhans, Goose Creek Limestone, Goose Creek Reservoir, Hamlin Sound, Harleyville, Harleyville Formation, Hollywood, Holocene, Huger, Huttos Lake, Intracoastal Waterway, Island of Palms, Jacksonboro, Jedburg, Johns Island, Kiawah River, Ladson, Ladson Formation, Lake Francis, Lake Merkel, Lake Moultrie, Lincolnville, Marine Geology, Marks Head Formation, Meggett, Miocene, Moncks Corner, Neogene, North Charleston, North Edisto River, North Santee, North Santee River, Okefenokee Formation, Oligocene, Open-File Report, Paleogene, Parachucla Formation, Parkers Ferry Formation, Penholoway Formation, Phanerozoic, Pinopolis, Pleistocene, Pliocene, Quaternary, Ravenel, Raysor Formation, Ridgeville, Saint Helena Sound, Santee Limestone, Seabrook Island, Sedimentology, Shulerville, Silver Bluff beds, South Edisto River, South Santee River, Stono Inlet, Stono River, Stratigraphy, Summerville, Summerville fault, Tail Race Canal, Ten Mile Hill Formation, Tertiary, Tibwin, Toogoodoo Creek, Tupelo Bay Formation Cross Member, Tupelo Bay Formation Pregnall Member, USGS Science Data Catalog (SDC), Waccamaw(?) Formation, Wadmalaw, Wadmalaw River, Wando, Wando Formation, West Branch Cooper River, Whiteville, Woodstock fault, alluvial terrace, alluvium, beach sand, bedrock geologic units, biostratigraphy, carbonate rock, cartography, clay deposits, clay or mud, climatologyMeteorologyAtmosphere, colluvium, earth sciences, earthquakes, economic geology, environment, fault zones, faults, flood plain, geography, geologic contacts, geologic history, geologic maps, geologic processes, geology, geomorphology, geoscientificInformation, geospatial datasets, gravel, gravel deposits, human impacts, lake or marine sediment, limestone, lithostratigraphy, maps and atlases, marine geology, mud flat, natural rock formations, nonmetallic mineral resources, peat, rocks and deposits, sand, sand deposits, sedimentary rocks, sedimentation, sedimentology, silt, stratigraphy, structural geology, structure contours, study areas, surficial geologic units, terrace, time periods, unconformities, unconsolidated deposits, unconsolidated material, Fewer tags

Core Research Center Cutting SE00019

Core Research Center, cutting SE00019, from well operated by PRUET & HUGHES-PELTO OILRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "SE00019", "API Num": "0102320064", "Operator": "PRUET & HUGHES-PELTO OIL", "Well Name": "16-4 CARLISLE UNIT", "Field": "WOMACK HILL", "State": "AL", "County": "CHOCTAW", "Thin Sec": "F", "Analysis": "F", "Latitude": "31.84184", "Longitude": "-88.19122", "coordinates_geohash": "dj9m1hth5thn", "Source": "FROM STATE RECORDS", "Min": "11000", "Max": "11980", "Security Flag": null, "crc_collection_name": "cutting", "sb_parent_id": "4f4e49d8e4b07f02db5df2d2", "intervals": [{"Formation": null, "Age": null, "Min Depth": null, "Max Depth": null}], "crcwc_url":...

Categories: Physical Item; Tags: Alluvial, coastal and low terrace deposits, Holocene, chert, clay, gravel, All tags... marl, peat, sand, silt, Fewer tags

Core Research Center Cutting HH01585

Core Research Center, cutting HH01585, from well operated by NoneRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "HH01585", "API Num": "0105320040", "Operator": null, "Well Name": "1 T.R. MILLER MILL TRUST UNIT", "Field": "LITTLE ESCAMBIA CREEK", "State": "AL", "County": "ESCAMBIA", "Thin Sec": "F", "Analysis": "F", "Latitude": "30.99997", "Longitude": "-87.19403", "coordinates_geohash": "dj9brg75zv6b", "Source": "FROM STATE RECORDS", "Min": "15000", "Max": "15120", "Security Flag": null, "crc_collection_name": "cutting", "sb_parent_id": "4f4e49d8e4b07f02db5df2d2", "intervals": [{"Formation": null, "Age": null, "Min Depth": null, "Max Depth": null}], "crcwc_url": "https://my.usgs.gov/crcwc/cutting/report/75524",...

Categories: Physical Item; Tags: Alluvial, coastal and low terrace deposits, Holocene, chert, clay, gravel, All tags... marl, peat, sand, silt, Fewer tags

Core Research Center Cutting HH01630

Core Research Center, cutting HH01630, from well operated by LL&ERaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "HH01630", "API Num": "0105320027", "Operator": "LL&E", "Well Name": "33-3 T R MILLER MILL STATELINE", "Field": "LITTLE ESCAMBIA CREEK", "State": "AL", "County": "ESCAMBIA", "Thin Sec": "F", "Analysis": "F", "Latitude": "31.0019", "Longitude": "-87.17127", "coordinates_geohash": "djd027ez4jjb", "Source": "FROM STATE RECORDS", "Min": "15000", "Max": "15290", "Security Flag": null, "crc_collection_name": "cutting", "sb_parent_id": "4f4e49d8e4b07f02db5df2d2", "intervals": [{"Formation": null, "Age": null, "Min Depth": null, "Max Depth": null}], "crcwc_url": "https://my.usgs.gov/crcwc/cutting/report/76105",...

Categories: Physical Item; Tags: Alluvial, coastal and low terrace deposits, Holocene, chert, clay, gravel, All tags... marl, peat, sand, silt, Fewer tags

Core Research Center Cutting HH01612

Core Research Center, cutting HH01612, from well operated by HUMBLE OIL AND REFININGRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "HH01612", "API Num": "0105320003", "Operator": "HUMBLE OIL AND REFINING", "Well Name": "1 RAY E LOPER ET AL", "Field": "FLOMATON", "State": "AL", "County": "ESCAMBIA", "Thin Sec": "F", "Analysis": "F", "Latitude": "31.03599", "Longitude": "-87.21486", "coordinates_geohash": "dj9bx3ujdryg", "Source": "FROM STATE RECORDS", "Min": "14800", "Max": "15470", "Security Flag": null, "crc_collection_name": "cutting", "sb_parent_id": "4f4e49d8e4b07f02db5df2d2", "intervals": [{"Formation": null, "Age": null, "Min Depth": null, "Max Depth": null}], "crcwc_url":...

Categories: Physical Item; Tags: Alluvial, coastal and low terrace deposits, Holocene, chert, clay, gravel, All tags... marl, peat, sand, silt, Fewer tags

Core Research Center Cutting AZ00037

Core Research Center, cutting AZ00037, from well operated by UNION TEXAS PET CORaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "AZ00037", "API Num": "5026710001", "Operator": "UNION TEXAS PET CO", "Well Name": "1 PURE-KAHILTNA UNIT", "Field": "EXPLORATORY", "State": "AK", "County": "TALKEETNA", "Thin Sec": "F", "Analysis": "F", "Latitude": "62.0405364012", "Longitude": "-150.7555290646", "coordinates_geohash": "behbcqphmd4p", "Source": "FROM STATE RECORDS", "Min": "109", "Max": "7250", "Security Flag": null, "crc_collection_name": "cutting", "sb_parent_id": "4f4e49d8e4b07f02db5df2d2", "intervals": [{"Formation": null, "Age": null, "Min Depth": null, "Max Depth": null}], "crcwc_url":...

Categories: Physical Item; Tags: Quaternary, Unconsolidated surficial deposits, undivided, peat

Sample mounting for organic petrology: no thermal effects from transient exposure to elevated temperatures (2019)

For sample mounting, organic petrology laboratories typically use cold-setting epoxy-resin (e.g., 40°C, used by Oklahoma Geological Survey, OGS) or heat-setting plastic (e.g., 180°C, used by U.S. Geological Survey, USGS). Previous workers have suggested a systematic vitrinite reflectance (VRo) increase was associated with the thermoplastic preparation process, relative to epoxy mounting, which was attributed to moisture loss from the transient high temperatures of plastic mounting. In this study, we evaluated thermal effects to low maturity organic matter from transient exposure to elevated temperatures. A subbituminous coal sample was subjected to long-term (4 to 38 weeks) exposure to temperatures of 85 to 120°C...

Categories: Data; Tags: Energy Resources, Epoxy-resin, Georgia, Lignite, Lousiana, All tags... Mississippi, North Dakota, Okefenokee Swamp, Organic petrology, Peat, Sample Preparation, Shale, Subbituminous coal, Texas, Thermal Maturity, Thermoplastic, USGS Science Data Catalog (SDC), United Kingdom, Fewer tags

Core Research Center Core T817

Core Research Center, core T817, from well operated by UNION TEXASRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "T817", "API Num": "5026710001", "Operator": "UNION TEXAS", "Well Name": "1 PURE KAHILTNA", "Field": "WILDCAT", "State": "AK", "County": "TALKEETNA", "Type": "CUTTINGS", "Photos": "F", "Thin Sec": "F", "Analysis": "F", "Latitude": "62.040536", "Longitude": "-150.755529", "coordinates_geohash": "behbcqphmd4h", "Source": "FROM STATE RECORDS", "Security Flag": "NO SPECIAL RESTRICTIONS", "crc_collection_name": "core", "sb_parent_id": "4f4e49dae4b07f02db5e0486", "intervals": [{"Formation": "UNKNOWN", "Age": null, "Min Depth": "2550", "Max Depth": "2930"}], "crcwc_url": "https://my.usgs.gov/crcwc/core/report/14239",...

Categories: Physical Item; Tags: Quaternary, Unconsolidated surficial deposits, undivided, peat

Core Research Center Core E727

Core Research Center, core E727, from well operated by USGSRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "E727", "API Num": "5027920003", "Operator": "USGS", "Well Name": "1 INIGOK", "Field": "EXPLORATORY", "State": "AK", "County": "TESHEKPUK", "Type": "SLABBED", "Photos": "T", "Thin Sec": "T", "Analysis": "T", "Latitude": "70.004853", "Longitude": "-153.099168", "coordinates_geohash": "bs7nhpuxff6n", "Source": "FROM STATE RECORDS", "Security Flag": "NO SPECIAL RESTRICTIONS", "crc_collection_name": "core", "sb_parent_id": "4f4e49dae4b07f02db5e0486", "intervals": [{"Formation": "UNKNOWN", "Age": null, "Min Depth": "2631", "Max Depth": "2662"}, {"Formation": "UNKNOWN", "Age": null,...

Categories: Physical Item; Tags: Quaternary, Unconsolidated surficial deposits, undivided, peat, sand

Core Research Center Cutting SE00020

Core Research Center, cutting SE00020, from well operated by PRUET & HUGHES-PELTO OILRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "SE00020", "API Num": "0102320092", "Operator": "PRUET & HUGHES-PELTO OIL", "Well Name": "8-15-1 MCPPHEASON UNIT", "Field": "WOMACK HILL", "State": "AL", "County": "CHOCTAW", "Thin Sec": "F", "Analysis": "F", "Latitude": "31.84513", "Longitude": "-88.19968", "coordinates_geohash": "dj9m0vnzq6rz", "Source": "FROM STATE RECORDS", "Min": "11000", "Max": "11860", "Security Flag": null, "crc_collection_name": "cutting", "sb_parent_id": "4f4e49d8e4b07f02db5df2d2", "intervals": [{"Formation": null, "Age": null, "Min Depth": null, "Max Depth": null}], "crcwc_url":...

Categories: Physical Item; Tags: Alluvial, coastal and low terrace deposits, Holocene, chert, clay, gravel, All tags... marl, peat, sand, silt, Fewer tags

Core Research Center Core E735

Core Research Center, core E735, from well operated by USGSRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "E735", "API Num": "5010320017", "Operator": "USGS", "Well Name": "1 NORTH INIGOK", "Field": "EXPLORATORY", "State": "AK", "County": "HARRISON BAY", "Type": "SLABBED", "Photos": "T", "Thin Sec": "F", "Analysis": "T", "Latitude": "70.257589", "Longitude": "-152.765984", "coordinates_geohash": "bs7rewp0nef5", "Source": "FROM STATE RECORDS", "Security Flag": "VIEWING ALLOWED, NO SAMPLING UNLESS APPROVED", "crc_collection_name": "core", "sb_parent_id": "4f4e49dae4b07f02db5e0486", "intervals": [{"Formation": "UNKNOWN", "Age": null, "Min Depth": "4022", "Max Depth": "4036"}, {"Formation":...

Categories: Physical Item; Tags: Quaternary, Unconsolidated surficial deposits, undivided, clay, peat, sand, All tags... silt, Fewer tags

Core Research Center Core E839

Core Research Center, core E839, from well operated by USGSRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "E839", "API Num": "5010320010", "Operator": "USGS", "Well Name": "1 FORAN", "Field": "EXPLORATORY", "State": "AK", "County": "HARRISON BAY", "Type": "SLABBED", "Photos": "T", "Thin Sec": "T", "Analysis": "T", "Latitude": "70.832227", "Longitude": "-152.303122", "coordinates_geohash": "bsedyq878h1h", "Source": "FROM STATE RECORDS", "Security Flag": "NO SPECIAL RESTRICTIONS", "crc_collection_name": "core", "sb_parent_id": "4f4e49dae4b07f02db5e0486", "intervals": [{"Formation": "UNKNOWN", "Age": null, "Min Depth": "7539", "Max Depth": "7557"}, {"Formation": "UNKNOWN", "Age":...

Categories: Physical Item; Tags: Quaternary, Unconsolidated surficial deposits, undivided, clay, mud, peat, All tags... sand, silt, Fewer tags

Core Research Center Core E838

Core Research Center, core E838, from well operated by USGSRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "E838", "API Num": "5010320007", "Operator": "USGS", "Well Name": "1 SOUTH HARRISON BAY", "Field": "EXPLORATORY", "State": "AK", "County": "HARRISON BAY", "Type": "SLABBED", "Photos": "T", "Thin Sec": "F", "Analysis": "T", "Latitude": "70.424812", "Longitude": "-151.731244", "coordinates_geohash": "bss0ek2wmb2p", "Source": "FROM STATE RECORDS", "Security Flag": "NO SPECIAL RESTRICTIONS", "crc_collection_name": "core", "sb_parent_id": "4f4e49dae4b07f02db5e0486", "intervals": [{"Formation": "UNKNOWN", "Age": null, "Min Depth": "7022", "Max Depth": "7052"}, {"Formation": "UNKNOWN",...

Categories: Physical Item; Tags: Quaternary, Unconsolidated surficial deposits, undivided, clay, peat, sand, All tags... silt, Fewer tags

Core Research Center Cutting HH01523

Core Research Center, cutting HH01523, from well operated by VALENCE OPERATING/PRUET AND HUGHESRaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "HH01523", "API Num": "0102320091", "Operator": "VALENCE OPERATING/PRUET AND HUGHES", "Well Name": "1 A.J. PHILLIPS 12-12", "Field": "BARRYTOWN", "State": "AL", "County": "CHOCTAW", "Thin Sec": "F", "Analysis": "F", "Latitude": "31.84891", "Longitude": "-88.24253", "coordinates_geohash": "dj9jpvzv250s", "Source": "FROM STATE RECORDS", "Min": "11000", "Max": "12260", "Security Flag": null, "crc_collection_name": "cutting", "sb_parent_id": "4f4e49d8e4b07f02db5df2d2", "intervals": [{"Formation": null, "Age": null, "Min Depth": null, "Max Depth":...

Categories: Physical Item; Tags: Alluvial, coastal and low terrace deposits, Holocene, chert, clay, gravel, All tags... marl, peat, sand, silt, Fewer tags

Core Research Center Cutting HH01573

Core Research Center, cutting HH01573, from well operated by SERIO-DALCORaw Properties from download, web scrape, MapServer, and Macrostrat API{"Lib Num": "HH01573", "API Num": "0105320055", "Operator": "SERIO-DALCO", "Well Name": "1 MCDAVID LANDS 28-4", "Field": "LITTLE ESCAMBIA CREEK", "State": "AL", "County": "ESCAMBIA", "Thin Sec": "F", "Analysis": "F", "Latitude": "31.01715", "Longitude": "-87.16402", "coordinates_geohash": "djd02w3pgpgf", "Source": "FROM STATE RECORDS", "Min": "15000", "Max": "15570", "Security Flag": null, "crc_collection_name": "cutting", "sb_parent_id": "4f4e49d8e4b07f02db5df2d2", "intervals": [{"Formation": null, "Age": null, "Min Depth": null, "Max Depth": null}], "crcwc_url": "https://my.usgs.gov/crcwc/cutting/report/75484",...

Categories: Physical Item; Tags: Alluvial, coastal and low terrace deposits, Holocene, chert, clay, gravel, All tags... marl, peat, sand, silt, Fewer tags