From GIANT mines; to a strange, forgotten hidden paradise; these are 10 BIGGEST Holes on Earth ! HEY YOU ! There are more awesome videos being made every week, like and subscribe to World Unearthed so you don't miss a beat ! 10.Umpherston Sinkhole 9..Kimberly Hole Located in South Africa; the Kimberly Hole is believed to be the largest hole excavated by hand. No dozers; no giant machinery; just sheer manpower. What was the incentive to dig a hole this big ? To NO ONE’s surprise; it was the discovery of diamonds. Between 1871 and 1914 miners extracted over 5,900 lbs (2,700 kg) of diamonds. Or wait; should we say it in carats? Well it's 13,500,000 Carats. This hole is pretty big, boasting a nice 1500 ft (463m) wide size. It was dug to a depth of 240 meters (790 feet) but then refilled with debris reducing its depth to about 215 meters (705 feet). 8.Kola Superdeep borehole 7.Mirny Diamond Mine This is a former open pit diamond mine located in the Siberian region of eastern Russia. It is 1700ft 525 meters deep and has a diameter of 3,900 ft 1200 meters making it the 4th largest excavated hole in the world. Diamonds were first discovered on June 13, 1955 by soviet geologists during the large Amakinsky expedition in Yakut. They found traces of Kimberlite volcanic rock that is usually associated with diamonds. The development of the mine happened in extremely harsh climate conditions. During winter months, the temperatures were so low that the ground would freeze making it hard to mine. How bad did it get? There were reports that steel and car tires would just SHATTER and the oil needed top operate machinery would freeze overnight. Somehow, even in those conditions, there were people willing to excavate diamonds, and the company actually made a profit. 6.Crveno jezero 5.Bingham Canyon mine This hole is commonly known as Kennecott Copper Mine among the locals and was designated a national historic landmark in 1966. It is an open pit mining located at Salt Lake County in Utah. It is the largest man-made open pit excavation project in the world and it is estimated to have produced more copper than any other mine in history,or about 19 million tons. If it were a stadium, it could seat 9 million people. Even though it is a copper mine, it has yielded a wide range of byproducts like gold, silver, molybdenum and large amounts of platinum and palladium. It has been nicknamed the rich hole on earth because it extracts approximately 450,000 tons of rock daily. And earns US$ 1.8 billion dollars per year. 4.Great Blue Hole Belize 3.Diavik Mine This diamond mine was constructed in 2001 and commenced production in January 2003. It is located in the Northwest Territories in Canada about 300 kilometers from Yellowknife. It is an important part of the regional economy employing 1000 workers and producing 1,400 kilograms of diamonds annually. The mine has three Kimberlite pipes currently being exploited. Unfortunately, the mine is expected to run out of diamonds in 2024, even after developing a fourth pipe expected to begin production in 2018. The mine sits above a mantle- a downward protruding thickened portion of the lithosphere- where relatively low heat-flow and reducing conditions have remained suitable for diamond formation and preservation for an extended period of geologic time. Another mysterious feature of this mine is the high proportion of coated crystals; the gem-quality diamonds that have been overgrown with younger cloudy rims. Recently, a study showed that the rims represent a much more recent growth phase of diamond in the deep mantle keel. At the site, summers are short and cool while winters are long and extremely cold and this area is considered an arctic semi desert. Daylight ranges from about four hours a day in the winter to as many as 20 hours per day during summer. In other words; perfect conditions. 2.Hoyo De Cimarron 1.Heavenly Pit, Xiaozhai Tiankeng The sinkhole was discovered in 1994, it is located in Fengjie County of Chongqing Municipality, Southwest China. It has a diameter of 2000ft(626m) long, and with a depth of 2100ft(662m), this sinkhole is the largest one in the world ! Due to collapses of the walls surrounding this beauty; the rainy season is a sight to behold. Many waterfalls form around it. Heavenly pit formed some 10,000 years ago when a powerful underground river, which still flows underneath the sinkhole, formed the Triassic limestone Difeng cave that collapsed and in turn formed the sinkhole. The bottom of the sinkhole is the only location where the underground river shows. 1285 species of plants can be studied here; also animals like the clouded leopard have been found in the sinkhole. So make sure you bring your clouded leopard pepper spray. 0. The “Ooops” Sinkhole | Florida
Views: 127023 World Unearthed
Zsalynn is excited for a fresh start but her 360-body lift at a Beverly Hills clinic proves more challenging than expected. #My600lbLife | Wednesdays 9/8c on TLC http://www.tlc.com/tv-shows/my-600-lb-life/ Watch full episodes for free! https://www.discoverygo.com/my-600-lb-life/ Subscribe to TLC: http://bit.ly/SubscribeTLC Facebook: https://www.facebook.com/TLC Twitter: https://twitter.com/TLC
Views: 1052456 TLC
The Komatsu D575A is a 1,150 horsepower tractor crawler available as a bulldozer/ripper, the D575A-3, or as a dedicated bulldozer, the D575A-3 SD Super Dozer. Equipped with a standard blade, both versions are capable of moving 90 cubic yards of material per pass although the D575A-3 SD Super Dozer is capable of moving 125 cubic yards of material per pass if equipped with an optional blade. The D575A-3 can dig to a maximum depth of 6 feet 9 inches using its single shank ripper. Currently the largest bulldozer in production, the D575A has been produced by Komatsu Ltd. in Osaka, Japan since 1991. Surface mine operators in the United States, Canada and Australia are the primary users of the D575A, although it is sometimes used in heavy construction applications. Manufacturer: Komatsu Ltd. Production: 1989-present Length: 38 feet 5 inches (11.71 m) Width: 24 feet 3 inches (7.39 m) (width of standard blade) Height: 16 feet 0 inches (4.88 m) Weight: D575A-3 - 131,350 kilograms (289,580 lb) D575-A3 SD - 152,600 kilograms (336,400 lb) Propulsion: Tracks ----------------------------------------------------------------------------------------------------------- Strange and Extreme: Footage about all The Best in the world Subscribe Now: https://goo.gl/QbQrEz ----------------------------------------------------------------------------------------------------------- Our Social Media Facebook: https://goo.gl/yBFda7 Twitter: https://goo.gl/V17Bss
Views: 105374 Strange and Extreme
Opera Mini – A mobile browser with built-in newsfeed and video downloader! Opera Mini is a so much more than just a browser – get ready to read news, download video and more – all the while saving data! Get it for free: http://opr.as/2kszRcG Got the new Opera Mini browser? Opera Mini is one of the world’s most popular mobile browsers. This fast mobile browser blocks ads and saves you data. The unique compression technology lets you load pages faster and download more video – for free. Browse faster! With Opera Mini you get one of the fastest mobile browsers on the market, developed to run at high speed on any internet connection. So, whether you’re on a secluded island in the Philippines or in urban London, you’ll be browsing at top speed, much thanks to the unique compression technology built into the browser. Our speed tests show that Opera Mini is much faster than other mobile browsers like Chrome and the UC browser. Opera Mini in extreme savings mode loads web pages 72% faster than Chrome, and 64% faster than the UC browser. Are you wondering how we made the browser this fast? In addition to the unique compression technology, we built an ad blocker into the browser. Without ads, web pages are so much lighter – it takes no time to load them. It is all win, win, right? You get the content you want – just faster! If you want a speedy mobile browser for Android, it’s time to give Opera Mini a try. Read more about it on http://www.opera.com/mobile/mini/android. Get the news Opera Mini brings the news that’s important to you directly to the browser. The news feed notices what kind of content you like and gives you more of it. Swipe through a range of news channels within the browser, subscribe to your favorite channels, and save stories to read later. You’ll find this mobile browser makes catching up with the world an exciting journey – no more shuffling past the the boring stuff. Download videos Opera Mini’s download manager provides our mobile users with more power and control while downloading web content, including pictures and videos. Also, people are increasingly downloading more video to their phones, as the average phone now has a higher memory. Mobile users want a browser that handles video well, putting mobile browsers that do one step ahead of the crowd. With Opera Mini’s download manager you can: - Control the number of files you download simultaneously. - Get alerts when downloading large files, over 15MB. - Select the download location. Block ads Online ads take up precious screen space, slow down the browsing and adds to the user’s data bill. We added an ad blocker to Opera Mini because it offers our mobile users a better browsing experience. Browsing with Opera Mini now means users can surf at a higher speed, skip extra data charges and stretch their internet packages even further by blocking in the browser intrusive and data-wasting ads and heavy tracking. Opera Mini now loads web pages 40% faster than with the ad blocker disabled. Cost-conscious users will also be pleased to hear that removing online ads has a positive effect on the data bill, saving users lots of data. By blocking ads, Opera Mini users can achieve up to an additional 14% in data savings on top of the default data savings compression mode, so that less is deducted from the user's mobile data plan. Get a mobile browser with ad blocker to browse faster and save data, for free: http://opr.as/2kszRcG Extend your data Opera Mini’s unique compression technology saves you large amounts of data everyday by shrinking web page content data to 10% of the original size, for any web page you request. Choosing one of two modes, users can optimize their data compression for different network conditions. Our data savings mode compresses web pages without affecting the page display, making it the perfect mode for surfing the web on 3G or Wi-Fi networks. The extreme mode compresses web pages extensively, giving users a very high-speed internet experience while using very little mobile data. This mode is ideal for when users are experiencing slow network conditions, or just want to make their data plans last longer. There’s more in Opera Mini – get it for free on Google Play. Video script: Got the new Opera Mini browser? Browse faster! Get the news Download videos Block ads Extend your data There’s more in Opera Mini Download now for free Get in on Google Play Download on the App Store
Views: 12351202 Opera
I recorded a short clip of an Audi R8 V10 Racing Edition by Anderson Germany in Monaco, the car features carbon fiber components (front apron, rear spoiler, rear diffuser, and mirror housings) and 19-inch alloy wheels. Inside, the cabin boasts custom upholstery and carbon fiber trim. The engine is outfitted with a new ECU, a high-flow air filter, and a sport exhaust system which weighs 17 kg (37 lbs) less than the standard one. Thanks to these modifications, the 5.2-liter V10 produces 585 PS (430 kW / 577 hp) instead of 525 PS (386 kW / 518 hp). While the company declined to release detailed performance specifications, they stated the top speed increases by 12 km/h (8 mph) to 328 km/h (204 mph).
Views: 13834 Autofiel
This is not quite a T-Bar row, but it's similar. I figured I can use the preacher curl pad & bar to perform rows at the end of my back workout -- after barbell rows, weighted pull ups, and barbell shrugs. I don't have special equipment so I decided to use this for an extra exercise.
Views: 79 Living Dead Fitness
This video channel is developed by Amrita University's CREATE http://www.amrita.edu/create ▶ For more Information @ http://amrita.olabs.co.in/?sub=1&brch=6&sim=146&cnt=1 ▶ Amrita Online Lab Project website http://www.olabs.edu.in/ ▶ Subscribe @ https://www.youtube.com/user/amritacreate http://www.youtube.com/amritavlab ▶ Like us @ https://www.facebook.com/CREATEatAmrita Copyright © 2016 Amrita University Developed by Amrita University & CDAC Mumbai. Funded by MeitY (Ministry of Electronics & Information Technology) Metre bridge-Resistance of a wire :- The metre bridge is operates under Wheatstone’s principle. Here, four resistors P, Q, R, and S are connected to form the network ABCD. The terminals A and C are connected to a battery, and the terminals C and D are connected to a galvanometer through keys K1 and K2 respectively. In the balancing condition, there is no deflection on the galvanometer. Then, P/Q = R/S. This video explains how to find the resistance of a given wire using a metre bridge and hence determine the specific resistance of its materials.
Views: 750821 amritacreate
SUZUKI GSX-R 1000 2018/ TEST DRIVE 2017 PRECIO MEXICO 280,990.00 mxn USA 14,700 USD MOTOR Ciclo 4T Tipo de disposición en línea Número de cilindros 4 Diámetro 74,5 mm Carrera 57,3 mm Cilindrada 999 cc Relación de compresión 13,2:1 Refrigeración Líquida Distribución DOHC Válvulas por cilindro 16 Tipo alimentación Inyección electrónica Alimentación diámetro 46 mm Encendido Electrónico Arranque Eléctrico Potencia máxima declarada en CV 202 Potencia máxima declarada en kW 148 Régimen de potencia máxima 13200 Régimen par máximo declarado 10800 Par máximo declarado en mkg 12 Par máximo declarado en Nm 118 TRANSMISIÓN Tipo Manual Transmisión primaria Engranaje Transmisión secundaria Vadena Embrague Multidisco en aceite Tipo accionamiento Por cable Número velocidades 6 HASIS Chasis Doble viga Sección Ovalada Material Aluminio SUSPENSIÓN Tipo suspensión delantera Horquilla invertida Marca suspensión delantera Showa Barra suspensión delantera 43 mm Recorrido suspensión delantera 120 mm Tipo suspensión trasera Monoamortiguador progresivo Marcha suspensión trasera Showa Recorrido suspensión trasera 138 mm Regulación precarga muelle delantero Sí Precarga muelle regulación trasera Sí RUEDAS Llanta delantera 17 x 3,5 Llante trasera 17 x 6,0 Rueda delantera 120/70-17 Rueda trasera 190/55-17 FRENOS Tipo freno delantero Doble Disco Diámetro freno delantero 320 mm Pinzas frenos delantero Anclaje radial Marca bomba freno delantero Nissin Número discos delanteros 2 Número pistones pinza freno delantero 4 Tipo freno trasero Disco Diámetro freno trasero 220 mm Pinzas freno trasero Convencional Número discos freno trasero 1 Número pistones pinza freno trasero 1 Sistemas especiales frenos ABS ENGINE Engine 999.8cc, 4-stroke, liquid-cooled, 4-cylinder, DOHC 999.8cc, 4-stroke, liquid-cooled, 4-cylinder, DOHC Bore x Stroke 76.0 x 55.1 mm (2.992 x 2.169 in.) 76.0 x 55.1 mm (2.992 x 2.169 in.) Compression Ratio 13.2: 1 13.2: 1 Fuel System Suzuki Fuel Injection with Ride-by-Wire throttle bodies Suzuki Fuel Injection with Ride-by-Wire throttle bodies Starter Electric Electric Lubrication Wet sump Wet sump DRIVE TRAIN Transmission 6-speed constant mesh 6-speed constant mesh Clutch Wet, multi-plate type Wet, multi-plate type Final Drive Chain, RK525GSH CHASSIS Suspension Front Inverted telescopic, coil spring, oil damped Suspension Rear Link type, single shock, coil spring, oil damped Link type, single shock, coil spring, oil damped Brakes Front Brembo 4-piston, Disc, twin Brembo 4-piston, Disc, twin Brakes Rear Nissin, 1-piston, Disc single Nissin, 1-piston, Disc single Tires Front 120/70ZR17M/C (58W), Tires Rear 190/55ZR17M/C (73W), Fuel Tank Capacity 16.0 L (4.2 US gallons) ELECTRICAL Ignition Electronic ignition (Transistorized) Headlight LED Tail Light LED DIMENSIONS Altura libre al piso 130 mm (5.1 in.) Altura del asiento 825 mm (32.5 in.) PESO TOTAL 201 kg (441 lbs.) Sígueme por: TWITTER: @Blitz_Rider https://twitter.com/Blitz_Rider FACEBOOK: https://www.facebook.com/BlitzRider
Views: 144802 Blitz Rider Todo sobre Motos
Similar to the LIPO overview from a while back here is a short video to cover the basics of brushless motor numbers and stats. You can see more detail on motor selection on some of my other videos. Thanks for watching, please comment and subscribe. Happy flying!
Views: 300038 Painless360
This is an audio version of the Wikipedia Article: https://en.wikipedia.org/wiki/Mining 00:01:51 1 History 00:02:00 1.1 Prehistoric mining 00:03:18 1.2 Ancient Egypt 00:04:31 1.3 Ancient Greek and Roman mining 00:08:15 1.4 Medieval Europe 00:12:23 1.5 Classical Philippine civilization 00:13:36 1.6 The Americas 00:16:44 1.7 Modern period 00:18:22 2 Mine development and life cycle 00:21:09 3 Mining techniques 00:22:39 3.1 Surface mining 00:23:44 3.2 Underground mining 00:25:16 3.3 Highwall mining 00:27:02 4 Machines 00:28:27 5 Processing 00:31:18 6 Environmental effects 00:35:27 6.1 Waste 00:38:00 6.2 Renewable energy and mining 00:38:45 7 Mining industry 00:43:04 7.1 Corporate classifications 00:43:54 7.2 Regulation and governance 00:47:59 7.3 World Bank 00:50:07 8 Safety 00:53:52 9 Records 00:56:26 10 Metal reserves and recycling Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago. Learning by listening is a great way to: - increases imagination and understanding - improves your listening skills - improves your own spoken accent - learn while on the move - reduce eye strain Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone. Listen on Google Assistant through Extra Audio: https://assistant.google.com/services/invoke/uid/0000001a130b3f91 Other Wikipedia audio articles at: https://www.youtube.com/results?search_query=wikipedia+tts Upload your own Wikipedia articles through: https://github.com/nodef/wikipedia-tts Speaking Rate: 0.9838512602070575 Voice name: en-GB-Wavenet-D "I cannot teach anybody anything, I can only make them think." - Socrates SUMMARY ======= Mining is the extraction of valuable minerals or other geological materials from the earth, usually from an ore body, lode, vein, seam, reef or placer deposit. These deposits form a mineralized package that is of economic interest to the miner. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay. Mining is required to obtain any material that cannot be grown through agricultural processes, or feasibly created artificially in a laboratory or factory. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even water. Mining of stones and metal has been a human activity since pre-historic times. Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, and final reclamation of the land after the mine is closed. De Re Metallica, Georgius Agricola, 1550, Book I, Para. 1Mining operations usually create a negative environmental impact, both during the mining activity and after the mine has closed. Hence, most of the world's nations have passed regulations to decrease the impact. Work safety has long been a concern as well, and modern practices have significantly improved safety in mines. Levels of metals recycling are generally low. Unless future end-of-life recycling rates are stepped up, some rare metals may become unavailable for use in a variety of consumer products. Due to the low recycling rates, some landfills now contain higher concentrations of metal than mines themselves.
Views: 17 wikipedia tts
This is an audio version of the Wikipedia Article: https://en.wikipedia.org/wiki/Mining 00:01:48 1 History 00:01:57 1.1 Prehistoric mining 00:03:13 1.2 Ancient Egypt 00:04:23 1.3 Ancient Greek and Roman mining 00:08:00 1.4 Medieval Europe 00:12:01 1.5 Classical Philippine civilization 00:13:12 1.6 The Americas 00:16:14 1.7 Modern period 00:17:49 2 Mine development and lifecycle 00:20:32 3 Mining techniques 00:22:00 3.1 Surface mining 00:23:03 3.2 Underground mining 00:24:32 3.3 Highwall mining 00:26:16 4 Machines 00:27:38 5 Processing 00:30:22 6 Environmental effects 00:34:25 6.1 Waste 00:36:53 6.2 Renewable energy and mining 00:37:36 7 Mining industry 00:41:45 7.1 Corporate classifications 00:42:33 7.2 Regulation and governance 00:46:31 7.3 World Bank 00:48:38 8 Safety 00:52:16 9 Records 00:54:44 10 Metal reserves and recycling Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago. Learning by listening is a great way to: - increases imagination and understanding - improves your listening skills - improves your own spoken accent - learn while on the move - reduce eye strain Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone. Listen on Google Assistant through Extra Audio: https://assistant.google.com/services/invoke/uid/0000001a130b3f91 Other Wikipedia audio articles at: https://www.youtube.com/results?search_query=wikipedia+tts Upload your own Wikipedia articles through: https://github.com/nodef/wikipedia-tts Speaking Rate: 0.998962699879125 Voice name: en-US-Wavenet-C "I cannot teach anybody anything, I can only make them think." - Socrates SUMMARY ======= Mining is the extraction of valuable minerals or other geological materials from the earth, usually from an orebody, lode, vein, seam, reef or placer deposit. These deposits form a mineralized package that is of economic interest to the miner. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay. Mining is required to obtain any material that cannot be grown through agricultural processes, or created artificially in a laboratory or factory. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even water. Mining of stones and metal has been a human activity since pre-historic times. Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, and final reclamation of the land after the mine is closed. De Re Metallica, Georgius Agricola, 1550, Book I, Para. 1Mining operations usually create a negative environmental impact, both during the mining activity and after the mine has closed. Hence, most of the world's nations have passed regulations to decrease the impact. Work safety has long been a concern as well, and modern practices have significantly improved safety in mines. Levels of metals recycling are generally low. Unless future end-of-life recycling rates are stepped up, some rare metals may become unavailable for use in a variety of consumer products. Due to the low recycling rates, some landfills now contain higher concentrations of metal than mines themselves.
Views: 58 wikipedia tts
This fat bar is from CFF Fit. It is priced modestly and I bought mine a few years ago for approximately $150. This fat bar is 45 lbs., 7 feet long, and has a mighty 1.92 inch diameter grip. This fat bar taxes the grip in ways you cannot get from 0.98 inch diameter olympic bars. This bar is difficult to hold onto and will increase strength in the hands, wrists, firearms, and ultimately across all angles. Once you return to a normal bar, the grip will be so strong from battling with this beast of a bar. This is my final set, mostly an overhand deadlift demo at 345 lbs. Thank you.
Views: 47 DadAust Russeth
Ejercicio: resultante de dos fuerzas. os fuerzas: F1 = 6 N y F2 = 8 N, están aplicadas sobre un cuerpo. Calcula la resultante, gráfica y numéricamente, en los siguientes casos: a) Si las dos fuerzas actúan en la misma dirección y sentido. b) Si las dos fuerzas actúan en la misma dirección y sentidos opuestos. c) Si las dos fuerzas actúan en direcciones perpendiculares. Si tienes alguna duda o alguna petición puedes dejarla en facebook. Facebook: https://www.facebook.com/8cifras Suscríbete: https://www.youtube.com/user/8CIFRAS
Views: 45911 8CIFRAS
Forza 4 championship division race 3; Nürburgring head-to-head. I'm in the 1997 Nissan Skyline GT-R (R33); the AI is driving a 2008 BMW M3 (E92); both tuned to Forza A-class. The BMW has a slight edge on the Skyline, but in this race I managed to pass the AI driver fairly early in the race when it got stuck behind a Volkswagen. Specs for 1997 Nissan Skyline GT-R V-spec (Class A): top speed: 290.2 km/h (180.3 mph), AWD 0-100 mph: 8.734 s, 100-0 mph: 91.5 m 314 kW, 483.4 N·m, 1381 kg, 54% front/rear, 2.8 L I6 twin turbo 421 hp, 356.5 ft-lb, 3045 lb Specs for 2008 BMW M3 (Class A): top speed: 324.6 km/h (201.7 mph), RWD 0-100 mph: 7.557 s, 100-0 mph: 91.3 m 372 kW, 482.4 N·m, 1468 kg, 52% front/rear, 4.2 L V8
Views: 122 Jake Hamby
What do you do when you're an off season powerlifter? Stupid shit. Tandem clean and press. Me and the girl Adam. We went for 375 after this. I got it, but big girl Adam couldn't lok it out. I'm 5'5", he's 6'. New form of Crossfit. Super Crossfit.
Views: 21 Donte' Wilson
How To Diagnose MAF Sensor E90 BMW my car had a rough idles when it's sitting still I learned that there was a mass air flow sensor, Engine Fault CODES: 2D06, 2D29, 29E0, 29E1,
Views: 105361 mike kushnir
Mining is the extraction of valuable minerals or other geological materials from the earth from an orebody, lode, vein, seam, or reef, which forms the mineralized package of economic interest to the miner. This video targeted to blind users. Attribution: Article text available under CC-BY-SA Public domain image source in video
Views: 261 encyclopediacc