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Questions tagged [geomorphology]

The [geomorphology] tag concerns the landforms and exogenous processes of the surface of the Earth or other solid surface planets.

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Subantarctic islands: man-made rock cairn or natural formation?

When surveying penguin colonies on subantarctic Antipodes Island, we found a cave that features a strange rock formation: The formation does not appear to be particularly exposed to the elements so ...
Tomm's user avatar
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2 votes
0 answers
32 views

Why is static modulus greater then dynamic modulus in limestone?

Generally dynamic modulus is greater then static modulus and experimental data matches that. But in chalcedonic limestone, the static modulus looks to be greater than the dynamic modulus. What could ...
mark22's user avatar
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3 votes
1 answer
77 views

Why would glaciers change its size? How to differenciate change in glacier size as a response to climate and its natural dynamics?

Glaciers flow as they deform under its own weight. But they also advance or retreat accordingly to the various climate factors. How would I differentiate a glacier that is in motion flowing down the ...
kc_nul's user avatar
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1 vote
0 answers
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More about hypsometry for large glaciers

I am currently reading a paper which says The elevation ranges between 1700 and 2200 m show smaller relative surface changes than the elevation ranges between 2200 and 3300 m. This has to be related ...
kc_nul's user avatar
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2 votes
0 answers
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Would it make sense to compare glacier fluctuations in New Zealand with Alps or Canadian rockies?

If I want to draw parallels between the glacier fluctuations between different glaciers, (considering similar size class, here, small) at a) New Zealand b) European Alps c) Canadian Rocky Mountains ...
kc_nul's user avatar
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1 vote
1 answer
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Does granite and basalt behave differently in different atmospheric pressures?

We all know that the oxygen levels increase and decrease as well as the temperature, so I believe it's safe to assume atmospheric pressure changes as well... And since granite and basalt are formed ...
American woman's user avatar
3 votes
1 answer
123 views

Obtaining ELA from AAR method

I am trying to understand how to obtain ELA using Accumulation area ratio method. My understanding is: Accumulation area/ ablation area is assumed to be constant. Empirical data of long term annual ...
kc_nul's user avatar
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1 vote
1 answer
55 views

Bright patterns in the Dry Andes

I am doing some preliminary research on aeolian/nival landforms in Andes and I came across this: located at -24.950948, -68.268528 and other locations throughout the Argentinian Dry Andes. Any idea ...
Vojta's user avatar
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4 votes
2 answers
359 views

What are these features on Eldon Hill?

Eldon Hill is a limestone hill in Derbyshire, England. It has a large quarry on it's NW side and a natural pothole just to the south of it's peak. It also has the remains of lead mines scattered ...
DrMcCleod's user avatar
  • 141
2 votes
0 answers
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Create my own timeline by collating data from different research

I'm researching various paleo-events (climate, geomorphology, etc) from different articles. I would in turn like to collate the findings into one comprehensive timeline. Example: I have articles ...
Nautilaus's user avatar
6 votes
1 answer
110 views

Do lakes tend to have elliptical shapes more often than circular shapes?

I saw this interesting graphic (The World’s 25 Largest Lakes, Side by Side) of some of the largest lakes in the world. It strikes me as somewhat curious that most of the lakes have a high eccentricity ...
Mark S's user avatar
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1 answer
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How large is the chance that the Badlands Guardian emerged from natural processes?

The Badlands Guardian is a geomorphological feature; see this website. According to Wikipedia, this figure has been created by natural processes. However, my intuition says that the chance that this ...
Riemann's user avatar
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6 votes
1 answer
178 views

What makes sand dunes shaped asymmetrically?

I have been working on a simulation to approximate the formation process of dunes. I understand that their formation is a result of saltation and aeolian processes, but I don't understand the exact ...
Ale Kid's user avatar
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6 votes
2 answers
283 views

How does one get a steep-sided stratovolcano with extremely fluid, low-viscosity lava?

The shape of a volcano generally depends strongly on the viscosity of the molten rock used to make it: If the magma/lava ("magva"?) is relatively fluid, it flows out gently, and you get a ...
Vikki's user avatar
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0 answers
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Volcanic Cones - Fissure Type [closed]

Can volcanic cones, similar to the one shown below form from fissure type of volcanoes?
Jithin Murali's user avatar
5 votes
1 answer
37 views

I am searching for a word to describe the area of a glacial valley where the sides transition into the floor?

I have been tasked with proof reading before publication a Russian paper that has been translated into basic English and am searching for a word to describe the area of a glacial valley where the ...
Olden Grumpy's user avatar
4 votes
1 answer
54 views

Is initial stream formation in a drainage basin random?

It's known that stream orders are highly regular: Horton showed that stream order is related to number of streams, channel length, and drainage area by simple geometric relationships; that is, stream ...
Slate's user avatar
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1 vote
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Mapping and calculating morphometric variables for Alluvial Fans in ArcMap?

I need to calculate various variables for Alluvial Fans in ArcMap such as Fan area, gradient, angle subtended by fan. The data I am using is SRTM 1 Arc-Second Global. I am attempting to map and ...
Geology98's user avatar
8 votes
2 answers
745 views

Similarities and differences between lava flows and fluvial geomorphology (rivers)

How are active lava flows similar to fluvial geomorphology? You can search youtube for these dramatic videos of lava flows, and they all seem to look very similar to streams or rivers. I know that the ...
thehungrygraduate's user avatar
9 votes
1 answer
664 views

Why does this shoreline change this way?

There are different reasons why a shoreline can change, including tides. But I've found a phenomenon that I can't explain. It happens in a Mediterranean beach called L'Esparrelló/La Caleta (link to ...
Ivan's user avatar
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5 votes
0 answers
53 views

Artifical Ore Genesis?

From my understanding, the formation of ores can be reduced to a simple three-step process of the removal of minerals from a source via some mechanism, the transportation of these minerals, and ...
zachery moïse's user avatar
1 vote
0 answers
342 views

How to calculate mountain front sinuosity index using DEM?

In tectonic geomorphology the Mountain front sinuosity index is one of the morphometric indexes. Smf = Lmf/Ls I have a DEM, so how do I use it to find the value? According to this diagram do I have ...
Gokul Anand's user avatar
2 votes
1 answer
60 views

Are Fluvial and River Terraces the same?

I study about fluvial terraces. However, resources related to this topic are limited. When I searched fluvial terraces in geomorphology books, I cannot find anything, but I find river terraces. My ...
Sun's user avatar
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1 vote
1 answer
63 views

How are tall cays formed?

From reading about Cays on Wikipedia it seems they are formed from coral reefs covered with sand or gravel. There are however some cays scattered around the world which are hundreds of feet off of ...
CoryG's user avatar
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3 votes
0 answers
60 views

Is there a modelling of Wave Rock (Hyden Rock) formation?

I'm interested in the visualization of the formation process of "strange" objects like Wave Rock (flared slope). I've found articles describing hypotheses of the rock formation but I cannot ...
Charlie's user avatar
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6 votes
2 answers
292 views

Geomorphological feature identification

I was studying a satellite map of Iceland and came across an interesting, but unnamed feature located between Vatnajökull glacier and Trölladyngja volcano (between 64°50'35"N, 17°11'21"W and 64°48'33"...
robaki's user avatar
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4 votes
2 answers
1k views

What sort of a plate is the Sunda plate?

I have read that the islands of Sumatra & Java have resulted from the subduction of oceanic crust of the Indo-Australian plate beneath the Sunda plate. I want to know whether this boundary is ...
HARVEER RAWAT's user avatar
2 votes
1 answer
160 views

Could Rumblings From Plutons be as Ominous as Rumblings From Volcanoes?

Mount Kinabalu in North Borneo is a 10 million year old pluton. A pluton is a magma plume from the mantle which was not able to reach the surface and erupt as a volcano, but solidified underground and ...
Michael Walsby's user avatar
3 votes
3 answers
336 views

Formation of Iceland

Iceland sits atop a divergent ocean-ocean boundary. But there are not many islands which are formed along a divergent boundary. Why is it so? Why do not mid ocean ridges often rise above the sea ...
HARVEER RAWAT's user avatar
11 votes
1 answer
2k views

Origin of Andaman and Nicobar islands

Are Andaman and Nicobar islands in Indian ocean a continuation of Alpide-Himalayan orogeny or are they volcanic in origin?
HARVEER RAWAT's user avatar
2 votes
1 answer
477 views

How Could Sheep Graze these Steep Hillsides Without Leaving any Marks?

Here are two images of English hill figures (The Cerne Abbas giant and the Uffington white horse): These hillsides, which are obviously grazed by sheep, show tracks that form numerous contour lines ...
Michael Walsby's user avatar
3 votes
1 answer
533 views

Gelifluction vs Solifluction

I'm currently studying cold environments, looking at periglacial processes. I've been looking into gelifluction and solifluction as processes of periglaciation. The two terms seem to be used, mostly,...
Chayan Lahiri's user avatar
4 votes
2 answers
244 views

When was it ever considered that the desert might be "man-made", or otherwise anthropocenically-induced?

This answer pointed me to the Wikipedia page for Farouk El-Baz in which the desert research and theories subsection says: During the past 20 years in his research at Boston University, El-Baz has ...
uhoh's user avatar
  • 7,070
5 votes
5 answers
589 views

What is this geomorphological form?

What is this geomorphological form located at Vitrolles, France? And how is it formed? It is like a 'raised flat land', or a base of a hill where the top 80% is cut, leaving only the wide, flat base.
tkokasih's user avatar
  • 151
4 votes
1 answer
630 views

How to determine the orientation of coastline from NetCDF file

I have a NetCDF file (gridded data) with a landsea mask. I would like to determine, for the coastal grid-cells, what the orientation of the coastline is. I need to do this in order to calculate the ...
ouranos's user avatar
  • 652
1 vote
1 answer
2k views

Peninsula vs Cape [closed]

I know that Peninsula is much larger than a cape, but is there a definite way to differentiate them? I.e. by area- if the total area is larger than 30 sqkm, any headland is classified as peninsula..
David's user avatar
  • 75
1 vote
2 answers
615 views

Sea cave vs Sea arch

How do you distinguish sea cave from sea arch? If I want to classify a crack of sea cliff as sea cave, has it to have a dead end? Would you call a geological formation as a sea cave even a kayak can ...
David's user avatar
  • 75
9 votes
3 answers
1k views

Is there a widely accepted reason for the formation of tafoni?

Expansion of tafoni seems to be based on weathering (seems reasonable enough.) But what creates them in the first place? There are a number of explanations online (Wikipedia lists eight plausible ...
Owen Versteeg's user avatar
5 votes
1 answer
79 views

Is sterescope still used to do cartography with orthophotography?

I used this tool at my degree a couple of lusters ago to do cartography with aerial orthophotos. We used it on cartography and geomorphology subjets. Source: gumtree.com The method consists ...
user avatar
3 votes
1 answer
147 views

What determines the scale of columnar jointing?

What physical parameters determine the scale of columnar jointing? What makes the columns thinner or thicker? What makes them taller or shorter? What causes the variation in a given site? What ...
jvriesem's user avatar
  • 225
1 vote
2 answers
740 views

What is the erosion rate of mountains?

How much height of a mountain or any topographic high, decreases for a million year averagely? What is the range? (min / max)
Muharrem Yavuz's user avatar
1 vote
0 answers
37 views

What causes these shapes in the coast of the Levant?

Along the coast of the Levant (maybe also in other places), there are some very distinct discontinuities such as these. It may be nothing at all, but they stood out to me. Now I was wondering if there ...
Yadeses's user avatar
  • 111
2 votes
2 answers
164 views

mountain database of elevation and distance from saddle (as a proxy for gradient)

I'm interested in doing data visualization projects about mountains. We have data from http://www.peaklist.org/ultras.html complied by Aaron Maizlish (Who we tried to contact but not sure of his ...
Damo Frankcom's user avatar
3 votes
1 answer
448 views

What is the purpose of analyzing the bed-load of a river?

A group of students and I have gone to a field trip where we performed tasks like: measuring the velocity of the river flow, finding the width and depth to produce a cross section along with valley ...
user15104's user avatar
2 votes
1 answer
3k views

Topography & physiography

What is the difference between physiography & topography? I can't understand the context in which to use both. Please explain by giving suitable examples.
Vandana's user avatar
  • 115
5 votes
1 answer
618 views

What is meant by Massif?

In India, Panchchuli, Kun Nun and Shilong only these mountain are claimed to be massif. Why other mountain formations are not termed as massif...? What are the characteristics of massif..? Anybody ...
MAHESH RAM's user avatar
5 votes
4 answers
6k views

Why are the mountains predominately grey or dark brown?

Observing many photos of mountains one can assume that most of the mountains are grey or brown. See also the mountain article at Wikipedia. There are however several ways a mountain can form, which ...
PF4Public's user avatar
  • 153
12 votes
2 answers
1k views

What causes these mound-like ground formations?

Whilst riding on Mam Tor in Castleton, England I came across this scene (not my photo) and I would like to know what causes the formations which I have ringed in red. They look like piles of earth ...
user124425's user avatar
27 votes
3 answers
10k views

Is there sand in Antarctica?

There's a song "Blizzard's Never Seen the Desert's Sand". Given Antarctica is a desert, someone questioned the title's validity. BUT is there sand in Antarctica? I'd imagine yes as it's a pretty ...
cr0's user avatar
  • 1,178
4 votes
1 answer
452 views

How are the Scala dei Turchi staircases formed?

The Scala dei Turchi i (Italian: "Stair of the Turks") is a rocky cliff on the coast of Realmonte in Italy: https://en.wikipedia.org/wiki/Scala_dei_Turchi#/media/File:Scala_dei_Turchi_panorama.jpg ...
Aage Kold's user avatar