Deutsch: Abbauzyklus beim mountaintop-removal mining: 1. Abräumen 2. die obere Flözgruppe wird gewonnen, das Zwischenmittel in Tälern aufgehaldet 3. das liegende Flöz wird mit Schürfkübelbaggern gewonnen und die Berge aufgehaldet 4. parallel zum Fortschreiten des Abbaus wird die neue Tagesoberfläche konturiert 5. nach Abschluß der Gewinnung wird die endgültige Oberflächenkontur hergestellt und das Gebiet rekultiviert.
English: Animation of EPA Mountaintop Removal public domain Pictures. Step 1: Layers of rock and dirt above the coal (called overburden) are removed. Step 2: The upper seams of coal are removed with spoils placed in an adjacent valley. Step 3: Draglines excavate lower layers of coal with spoils placed in spoil piles. Step 4: Regrading begins as coal excavation continues. Step 5: Once coal removal is complete, final regrading takes place and the area is revegetated.
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One thought on “Cannabaceae”
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction