Boudin necks, High Himalaya Crystalline, Alakhnanda Valley, Gahrwal Himalaya
|
[an error occurred while processing this directive]
| This site records two main features of these boudins: a) boudin necks used as shear planes of duplexes, whereas the boudins themselves become parallel to the ramps of such duplexes,(b) boudinaged quartz boudin neck infill. |
Boudinaged boudin neck
 |
Boudinaged boudin neck. A boudinaged Bt-poor psammitic layer, whose quartz neck was boudinaged. Notice on the top figure, left-hand-side, a quartz boudin neck forming a bridge Pandukeshwar Fm on the way to Malari, HHC. |
A stretched boudin neck, detached from the boudins on either side. Pandukeshwar Fm on the way to Malari, HHC. |
 A stretched boudin neck. Pandukeshwar Fm on the way to Malari, HHC. |
Boudin necks being used as slip planes on duplexes
Quartz vein in boudin neck aligned parallel to shear plane and boudins at an angle forming a thrust duplex to the SW (left). |
 Quartz vein in boudin neck aligned parallel to shear plane and boudins at an angle forming a thrust duplex to the SW (left). |
Other interesting boudins from the HHC
Boudin of psammite with downward younging cross-bedding. Quartz vein in boudin neck. Pandukeshwar Fm on the way to Malari, HHC, Gahrwal Himalaya. |
 Large boudin cut by a granite dyke. HHC in Sikkim. |
Metasandstone boudins in block close to Thangu, north of Lachun, Sikkim Himalaya. |