Laboratories 189 Laboratory studies 2,408 Laboratory techniques 695 Lacustrine deposits 2,438 Lacustrine environment 3,036 Lacustrine features 462 Lacustrine sedimentation 355 Lake Agassiz 139 Lake deposits 1,624 Lake ice 2,071 LAKE ICE 157 Lake-level changes 428 Lakes 3,086 Lake sediments 1,698 Lake water 687 La Meseta Formation 137 Laminations 317 Land cover 1,101 Land development 155 Landform description 452 Landform evolution 2,408 Landforms 1,851 Land ice 557 Land management 563 Land reclamation 723 Landsat 627 LANDSAT 935 Landscape development 315 Landscapes 1,048 Landscape types 1,287 Landslides 961 Land subsidence 135 Land use 947 Large panel buildings 147 Laser methods 647 Lasers 886 Last glacial maximum 2,377 Late-glacial environment 217 Latent heat 224 Latitude 305 Laurentide ice sheet 802 Lava 315 Lava flows 175 Law, international 134 Laws and regulations 626 Layered materials 267 Layers 376 Leaching 251 Lead 747 Leakage 190 Leaves 173 Legislation 761 Levels 196 Libraries 151 Lichenometry 235 Lichens 903 Lidar 540 Lidar methods 312 Light effects 148 Light scattering 432 Light transmission 193 Lightweight concretes 140 Limestone 256 Limnology 1,703 Lineaments 143 Linings 154 Lipids 253 Liquefied gases 221 Liquid cooling 173 Liquid phase 231 Liquid phases 454 Liquid solid interfaces 454 Lithofacies 1,974 Lithology 325 Lithosphere 434 Lithostratigraphy 2,639 Litter 142 Littoral erosion 180 Littoral zone 196 Living taxa 1,464 Loading 1,453 Loads (forces) 1,194 Load tests 263 Loam 185 Loams 376 Loess 1,208 Logistics 1,399 Long range forecasting 352 Lower Cretaceous 322 Lower Holocene 563 Lower Oligocene 133 Lower Paleozoic 226 Lower Pleistocene 129 Low temperature 585 Low temperature effects--On man 289 Low temperature research 723 Low temperature tests 1,094 LOW TEMPERATURE TESTS 188 Lubricants 166 Luminescence 282