#TopographyTuesday | The Appalachian Mountains are a global biodiversity hotspot, home to one of the highest concentrations of salamander species, with a long history of coal formation and mining, where mountaintop removal has transformed entire ridgelines, burying streams and altering landscapes.
#TopographyTuesday: Tiankeng, meaning “heavenly pit,” is the term used in China for enormous karst sinkholes formed by the collapse of underground cave systems. Many of the world’s largest examples are found in southern China’s karst landscapes.
#Karst #China #Sinkholes #PhysicalGeography
#TopographyTuesday | More than 20,000 dinosaur footprints have been discovered preserved in the limestone layers of the Jura Mountains in Switzerland. These trackways date to roughly 150 million years ago during the Late Jurassic Period.
#JuraMountains #SwissAlps #Jurassic #Dinosaur
#TopographyTuesday | For decades, Antarctica’s interior remained one of the last blank spaces on Earth’s maps. Beneath ice up to 4 kilometers thick lies a rugged landscape of buried mountain ranges, deep valleys, marine basins, and hundreds of subglacial lakes.
#Antarctica #Subglacial #IceSheets
#TopographyTuesday | Fire below. Ice above. Vatnajökull’s deep blue ice and volcanic foundations make it one of the most dynamic glacier systems on Earth 🔥❄️
#TopographyTuesday Wyoming’s Ishawooa Snow Horse offers a natural reminder of spring’s arrival in the Absaroka Range, a fitting nod as many celebrate Lunar New Year and welcome a new cycle during the Year of the Horse 🧧🐎
#TopographyTuesday | The sandstone pillars of Zhangjiajie rise as tall, narrow rock towers shaped by erosion. Within the same landscape, the Zhangjiajie Glass Bridge stretches across Zhangjiajie Grand Canyon, while nearby stands the world’s tallest outdoor elevator built onto a cliff.
#topographytuesday | Beneath Cappadocia’s fairy chimneys lies Derinkuyu, the largest excavated underground city in Turkey, descending 18 levels and once sheltering up to 20,000 people along with livestock and stored supplies.
📍Cappadocia, Türkiye
#Cappadocia #FairyChimneys #Derinkuyu #Turkey
#topographytuesday: Venezuela's Gran Sabana is a land of table mountains, some of the oldest land forms on Earth, created long before the continents drifted apart. Rivers spilling over table mountains create waterfalls, including Angel Falls, the tallest waterfall in the world.
#topographytuesday: The Atchafalaya Basin comprises an area of 860,000 acres of swamps, lakes and water prairies. Cutting a 15-mile-wide path across South Louisiana, it is the largest and last great river-basin swamp in the U.S.
#topographytuesday Hawaiʻi is part of a vast volcanic mountain chain that rises from the floor of the Pacific Ocean. The islands are actually the exposed summits of enormous underwater mountains called seamounts, formed as the Pacific Plate moves over a stationary hotspot.
#topographytuesday: The mid ocean ridge systems are the largest geological features on the planet. The Mid-Atlantic Ridge (MAR) was discovered in the 1950s. Its discovery led to the theory of seafloor spreading and general acceptance of Wegener's theory of continental drift.
#TopographyTuesday Afar Depression is a geologic and topographic lowland in the Horn of Africa, known as one of the hottest, driest, and most tectonically active regions on Earth. It’s also one of the only places on Earth where you can physically see a continent splitting apart.
#TopographyTuesday Colca Canyon, one of the world’s deepest canyons, carved by time⌛️, water🌊, and volcanic forces🌋. Nature’s architecture at its finest. #peru #andes #southamerica #geography
🌄 #TopographyTuesday in the #Douro Valley! 🍇 Where terraced vineyards cling to steep, sun-drenched slopes and the river carves its way through ancient, golden hills. A living landscape shaped by wine, time, and incredible geology. 🍷✨#Portugal #wineexploration
This week’s #TopographyTuesday The Bavarian Alps! ❄️⛰️ Home to some of Europe’s most dramatic ridgelines and the prettiest valleys.
Today’s #TopographyTuesday takes us to Mount St. Helens,🌋✨ sitting in southwestern #Washington, in the Cascade Range, part of the Pacific Ring of Fire. It’s a #stratovolcano known for its steep slopes and explosive behavior.
#topographytuesday: From leaking pipes to vanishing lakes: Iran’s water system is failing under drought and demand. Lake Urmia shrinks, aquifers collapse, cities inch toward rationing. #Iran #WaterCrisis #water
#TopographyTuesday - Snow-capped symmetry, wild forests, and alpine skies: 🇯🇵 Hokkaidō’s “Ezo Fuji,” Mount Yōtei 🗻🌲🦊 #hokkaido #mountain #Japan
#topographytuesday Iceland’s Rift Valley: one of the only places on Earth where you can see tectonic plates drifting apart! The North American and Eurasian plates pull away about 2 cm each year, creating deep fissures, #volcanoes, and even new land.🌋✨
#Iceland #geology
#topographytuesday Barun Valley (World's 5th highest peak)
Barun Valley is part of the larger Kangchenjunga–Makalu landscape, a transboundary conservation area involving Nepal, India, and China.
Swipe to learn more!
#barunvalley #nepal #nepaltravel #himalayas #mountains
#topographytuesday - Mato Tipila (Bear Lodge)
Both a sacred site for many Plains Nations and a geologic marvel, magma near the surface cooled and erosion revealed those striking vertical columns.
#geology #wyoming #FirstNations
🏜️ Mystery in motion: the sailing stones. 🪨✨ #DeathValley #RacetrackPlaya #TopographyTuesday #DeathValleyNationalPark
#TopographyTuesday: The Clarion-Clipperton Zone
- Large region of the pacific between North America and Hawai’i.
- Could supply minerals critical for modern technology.
- Pollution risk of seabed mining is under-researched.
#deepseamining #criticalminerals
#TopographyTuesday: Land Reclamation
- The creation of new land out of water bodies and the restoration of disturbed land to its previous state.
- As technology has changed, the scope of such methods has increased.
#topography #dubai #netherlands #nanmadol #aztec
#topographytuesday: Tsodilo Hills, located in north-west Botswana, contains around 400 rock art sites with more than 4,000 individual paintings, and has been termed the “The Louvre of the Desert”. This region shows human occupation going back 100,000 years.
#TopographyTuesday The Everglades cover 1.5 million acres & are home to the largest area of protected mangrove forests in the Western Hemisphere, the largest continuous seagrass meadows on Earth, the oldest cypress trees on the planet, & 350+ animal species, many of them threatened or endangered.
Image showing a sand table from 1941 Tobruk that was bombed out killing an officer & his batman. Underneath that image is a larger Italian 1936 map of the same area of Tobruk defences.
Admiring the skill & knowledge involved in planning offensives from besieged TOBFORT.
O/C 12 Fld Coy RE built a model on 10/10/41 for a planned attack on Carmùsa, from the limited means of a constantly bombarded garrison.
#TopographyTuesday
@merrynwalters.uk
@crusaderproject.bsky.social
This #TopographyTuesday, check out the Molokini Crater, a crescent-shaped islet located just off the coast of Maui, Hawaii. 🌋💙
#TopographyTuesday #MolokiniCrater #HawaiiGeology #MarineConservation
