Table of Contents
What is a draw terrain feature?
A draw (US) or re-entrant (international) is a terrain feature formed by two parallel ridges or spurs with low ground in between them. The slope on a draw is generally quite sharp, with a clearly established fall line and characterized by a generally steep vertical drop over a short horizontal distance.
What does a spur look like on map?
A spur is a long, gently-sloping ‘tongue’ of ground that runs down from a hill to lower ground. You can spot a spur on the map quite easily – it looks like a long, narrow tongue of contour lines, dropping away from a mountain top or a ridge.
What is the difference between a spur and a ridge?
On a map, a ridge is depicted as two contour lines (often of the same contour) running side by side at the same elevation for some distance. When the lines converge, the ridge is falling in elevation, creating a spur.
What is a draw in a field?
Drawings can be of the whole specimen or of part of the specimen. The field drawing activity is designed to show your students how illustrations and text in a field book help describe a specimen at the time it was collected.
What is a spur and draw?
If you are standing in a draw, the ground slopes upwards in three directions and downward in the other direction. The contour lines depicting a draw are U-shaped or V-shaped, pointing toward high ground. Spur – A spur is a short, continuous sloping line of higher ground, normally jutting out from the side of a ridge.
What are terrain features?
The five major terrain features are: Hill, Ridge, Valley, Saddle, and Depression. The three minor terrain features are: Draw, Spur and Cliff. Terrain features can be learned using the fist or hand to show what each would look like on the ground. Hill-a point or small area of high ground.
Where are truncated Spurs found?
Truncated spurs can be found within mountain ranges, along the walls of river valleys, or along coastlines. A faceted spur is also a spur that ends in a triangular face, known as a triangular facet, with a broad base and an apex pointing upward.
What is the difference between a spur and a valley?
A spur is a ‘V’-shaped hill that juts out. A simple way to tell a valley from a spur when looking at contour lines is to remember that if the ‘V’ points uphill it’s a valley, if it points downhill it’s a spur.
What is a geographic spur?
A spur is a lateral ridge or tongue of land descending from a hill, mountain or main crest of a ridge. It can also be defined as another hill or mountain range which projects in a lateral direction from a main hill or mountain range.
What are 3 types of contour lines?
Contour lines are of three different kinds. They are the Index lines, Intermediate lines and the Supplementary lines.
What does a gully look like on a topographic map?
Gullies are represented by “U” or “V” shaped contour lines with their closed end pointing towards higher elevation. U-shaped contours represent more rounded gullies, while V-shaped contours are used for narrower gullies.
What is a draw water?
DEFINITIONS1. to take water from a well (=a deep hole in the ground) Synonyms and related words. To remove or move liquid. aspirate.
What does a field sketch look like?
Drawing a field sketch is a straightforward process: Draw an outline of the main features of the landscape with a pencil, eg hills and valleys or buildings and roads. Add detail to the sketch to record more information, eg river features, such as meanders , river cliffs and rapids .
What are the 7 most common terrain features found on a map?
Terrain Features on a Map (MGRS) Major Terrain Features. Hill. A hill is an area of high ground. Saddle. A saddle is a dip or low point between two areas of higher ground. Valley. A valley is a stretched-out groove in the land, usually formed by streams or rivers. Ridge. Depression. Minor Terrain Features. Draw.
What are the 5 major terrain features found on a map?
You must be able to recognize all the terrain features to locate a point on the ground or to navigate from one point to another. The five major terrain features are: Hill, Ridge, Valley, Saddle, and Depression.
What does a ridgeline look like on a topographic map?
A ridge is a long narrow section of higher ground with lower ground sloping away. On a topo map look for contour lines that form a “U” shape. The bottom of the U will be pointing downhill. Ridges may connect several hilltops or they may slope gradually down in one direction.
What are examples of terrain?
There are different types of terrains. The common ones are plateau, mountain, plain, and valley terrains. Other types of terrains include open, tundra, oasis, steppe, desert, swamp, forest, marsh, river, and hill. Open terrains are flat and open grasslands while tundra refers to flat and icy wastelands.
What is a ridge terrain feature?
Ridge. A ridge is a sloping line of high ground. If you are standing on the centerline of a ridge, you will normally have low ground in three directions and high ground in one direction with varying degrees of slope.
How are contour lines drawn on maps?
Contour lines are lines drawn on a map with equal elevation points, so elevation would be constant if you followed the contour line physically. The elevation and terrain shape of the contour lines shows. It is useful because they show the form of the land surface on the map–its topography.
Are interlocking spurs a feature of deposition?
While similar in general appearance, the mechanism behind the formation of interlocking spurs is different from that behind meanders, which arise out of a combination of lateral erosion and deposition. Interlocking spurs are formed as either a river or stream cuts its valley into local bedrock.
How do interlocking spurs occur?
As the river erodes the landscape in the upper course, it winds and bends to avoid areas of hard rock. This creates interlocking spurs, which look a bit like the interlocking parts of a zip. When a river runs over alternating layers of hard and soft rock, rapids and waterfalls may form.
What are rapids in a river?
Rapids are areas of shallow, fast-flowing water in a stream. Rapids tend to form in younger streams, with water flow that is straighter and faster than in older streams. Softer rocks in the streambed erode, or wear away, faster than harder rocks.
