Characterization of volcanic geomorphology and geology by slope and topographic openness

Prima, Oky Dicky Ardiansyah; Yoshida, Takeyoshi

doi:10.1016/j.geomorph.2009.12.005

Cited by 26 publications

(14 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Though there are several ways to partition DEM landscapes into a variety of terrain types (e.g., Yokoyama et al, 2002;Denizman, 2003;Iwahashi and Pike, 2007;Stepinski and Bagaria, 2009;Patel and Sarkar, 2010;Prima and Yoshida, 2010), the Topographic Position Index seemed effective at locating and quantifying the geomorphology of these recessed features. Somewhat unexpectedly, the LiDAR sensor system flying at an altitude of nearly 1 km was able to record a variety of geomorphologies from these vertical depressions.…”

Section: Discussionmentioning

confidence: 99%

Detection and Morphologic Analysis of Potential Below-Canopy Cave Openings in the Karst Landscape around the Maya Polity of Caracol using Airborne Lidar

Weishampel¹,

Hightower²,

Chase³

et al. 2011

JCKS

View full text Add to dashboard Cite

Locating caves can be difficult, as their entranceways are often obscured below vegetation. Recently, active remote-sensing technologies, in particular laser-based sensor systems (LiDARs), have demonstrated the ability to penetrate dense forest canopies to reveal the underlying ground topography. An airborne LiDAR system was used to generate a 1 m resolution, bare-earth digital elevation model (DEM) from an archaeologically-and speleologically-rich area of western Belize near the ancient Maya site of Caracol. Using a simple index to detect elevation gradients in the DEM, we identified depressions with at least a 10 m change within a circular area of no more than 25 m radius. Across 200 km 2 of the karst landscape, we located 61 depressions. Sixty of these had not been previously documented; the other was a cave opening known from a previous expedition. The morphologies of the depressions were characterized based on the LiDAR-derived DEM parameters, e.g., depth, opening area, and perimeter. We also investigated how the measurements change as a function of spatial resolution. Though there was a range of morphologies, most depressions were clustered around an average maximum depth of 21 m and average opening diameter of 15 m. Five depression sites in the general vicinity of the Caracol epicenter were visited; two of these were massive, with opening diameters of ,50 m, two could not be explored for lack of climbing gear, and one site was a cave opening into several chambers with speleothems and Maya artifacts. Though further investigation is warranted to determine the archaeological and geological significance of the remaining depressions, the general methodology represents an important advancement in cave detection.

show abstract

Section: Discussionmentioning

confidence: 99%

Detection and Morphologic Analysis of Potential Below-Canopy Cave Openings in the Karst Landscape around the Maya Polity of Caracol using Airborne Lidar

Weishampel¹,

Hightower²,

Chase³

et al. 2011

JCKS

View full text Add to dashboard Cite

show abstract

“…This class is mainly representative of zones with presence of debris-flow lobes, both relict and covered by vegetation (upper picture), as well as corresponding to recent deposits (lower picture). (Yokoyama et al, 2002;Prima and Yoshida, 2010) and local anomalies (Trevisani et al, 2010). The last two indexes are particularly useful for highlighting fine-scale morphologies, such as small channels, structural lineaments and small ridges.…”

Section: Field Surveys and Thematic Layersmentioning

confidence: 99%

Surface texture analysis of a high-resolution DTM: Interpreting an alpine basin

Trevisani¹,

Cavalli²,

Marchi³

2012

Geomorphology

View full text Add to dashboard Cite

“…The geomorphology of volcanoes has long been used to investigate volcanic development and activity (Thouret, 1999). Digital topography has been used to classify volcano morphology (e.g., Euillades et al, 2013;Favalli et al, 1999;Grosse et al, 2014;Pedersen & Grosse, 2014;Prima & Yoshida, 2010), identify and assess eruptive deposits and structures (e.g., Csatho et al, 2008;Hofton et al, 2006;Hutchison et al, 2015;Zouzias et al, 2011), and evaluate ongoing volcanic hazards (e.g., Favalli et al, 2005;Córdoba et al, 2015;Stefanescu et al, 2012). Many studies have used the morphometry of lava flow deposits (e.g., Nomikou et al, 2014;Pyle & Elliott, 2006;Tarquini et al, 2012;Ventura & Vilardo, 2007), cones (e.g., Fornaciai et al, 2012;Kervyn et al, 2012), and other deposits (e.g., Jessop et al, 2012) to investigate their rheology and dynamics of emplacement.…”

Section: Introductionmentioning

confidence: 99%

The Geomorphology, Structure, and Lava Flow Dynamics of Peralkaline Rift Volcanoes From High‐Resolution Digital Elevation Models

Hunt

Pyle

Mather

2019

Geochem Geophys Geosyst

View full text Add to dashboard Cite

Detailed topographic data from volcanoes can yield key insights into the controls on volcanic activity as well as hazards. High‐resolution digital elevation models generated from remote sensing data enable comparison of the geomorphology and structure of large and inaccessible volcanoes. We present new topographic data for three peralkaline volcanoes in the Main Ethiopian Rift (Fentale, Corbetti, and Gedemsa) and one volcano in the Afar Rift (Dabbahu), combined with field observations, reveal previously unidentified post‐caldera deposits and craters. Vent and crater locations are aligned with rift‐parallel faults and also with rift‐cutting structures in a variety of orientations. Caldera shape is controlled by interaction with these structures. The relative frequency and type of eruption varies greatly between these volcanoes over the past 150 kyr. Gedemsa is now largely inactive; Fentale hosts deposits from many small volume eruptions (<0.1 km3); while Corbetti has produced several large eruptions (~0.4–0.5 km3). Morphometry of peralkaline rhyolite deposits at Corbetti and Fentale, including ogives and levees, provides constraints on rheology. Emplacement viscosities of ~108–1011 Pa s at Fentale are similar to or lower than calc‐alkaline rhyolites and consistent with experimental and theoretical studies. The observations presented here have significant implications for hazard assessment in the Ethiopian rift and highlight the importance of structural features in controlling the location, magnitude, and style of volcanic activity in the Main Ethiopian Rift.

show abstract

Characterization of volcanic geomorphology and geology by slope and topographic openness

Cited by 26 publications

References 19 publications

Detection and Morphologic Analysis of Potential Below-Canopy Cave Openings in the Karst Landscape around the Maya Polity of Caracol using Airborne Lidar

Detection and Morphologic Analysis of Potential Below-Canopy Cave Openings in the Karst Landscape around the Maya Polity of Caracol using Airborne Lidar

Surface texture analysis of a high-resolution DTM: Interpreting an alpine basin

The Geomorphology, Structure, and Lava Flow Dynamics of Peralkaline Rift Volcanoes From High‐Resolution Digital Elevation Models

Contact Info

Product

Resources

About