Geography High School

What is fossil groundwater, and what does it indicate about the geologic history of the Sahara region?

Answers

Answer 1

Fossil groundwater refers to ancient groundwater reserves that have been trapped underground for thousands or even millions of years. This groundwater typically accumulated during periods of increased precipitation in the past when the climate was different from the present.

In the context of the Sahara region, fossil groundwater indicates that the area was once much wetter than it is today. The Sahara is currently the world's largest hot desert, characterized by arid and dry conditions. However, geological evidence and studies of the region's aquifers have revealed the presence of substantial amounts of fossil groundwater.

The geologic history of the Sahara region suggests that it experienced multiple phases of climate change over millions of years. During certain periods, the region was subject to more humid conditions with increased rainfall, resulting in the formation of lakes, rivers, and extensive groundwater systems. Over time, as the climate changed and the Sahara underwent desertification, these water sources gradually dried up, leaving behind the fossil groundwater reserves we see today.

The existence of fossil groundwater highlights the past hydrological dynamics of the Sahara and indicates the potential for water resources that were once available in the region. However, it is important to note that the extraction and use of this groundwater need to be carefully managed and balanced with sustainable practices to avoid depleting these finite resources.

learn more about geologic here :

https://brainly.com/question/32415601

#SPJ11

Related Questions

Other Questions
Which of the following is NOT suggested by the research on decision-making?Experts in a field can often make good intuitive judgments about what to do.People are highly accurate at predicting the long-term emotional impact of events.Emotional responses can provide valuable information when making decisions.People tend to react more strongly to perceived losses than to perceived gains. (a) Given an initial condition for y0, answer the following questions, where yt is the random variable at time t, is the error, t is also the time trend in (iii): (i) find the solution for yt, where yt=yt1+t+0.3t1. (ii) find the solution for yt, and the s-step-ahead forecast Et[yt+s] for yt=1.2yt1+t and explain how to make this model stationary. (iii) find the solution for yt, and the s-step-ahead forecast Et[yt+s] for yt=yt1+t+t and explain how to make this model stationary. Which is NOT legally required on a Nutrition Facts label?a) Kcalories from fatb) Grams of proteinc) Kcalories from fiberd) Kcalories per serving (Bond valuation) Enterprise, Inc, bonds have an annual coupon rate of 12 percent. The interest is pad somiannualy and the bonds mature in 9 years. Their par value is $1,000. If the market's required yield to maturity on a comparable-isk bond is 15 percent, what is the value of the bond? What is its value if the unterest is paid annually? The value of the Enterprise bonds if the interest is paid semiarmually is $ (Round to the nearest cent.) Read the attached article : "Public Procurement and Small Businesses: Estranged or Engaged?" by Kassa Woldesenbet and Ian Worthington.Discuss the importance of public procurement as a tool for economic development. (about 700 words) What seems to be Harriet Beecher Stowe's most fundamental problem with slavery according to Uncle Tom's Cabin? Is this biblical? which of the following is not a general information source that can provide valuable in-depth information on cybersecurity? Discuss five elements of Stompin' Tom's protest of the JunoAwards. You may wish to discuss his specific critiques of theJunos, and more broadly, the Canadian music industry, and Canadianmusicians. Assume that on January 1, 2010, Buckeye Co. issued at 95 bonds with a par value of $800,000, due in 20 years. Eight years after this issue date, General Bell calls the entire issue at 101 and cancels it. At that time, the unamortized discount balance is $24,000. Compute the amount of loss, to be recognized by Buckeye Co. as a result of retiring the bonds early. *Please show all work* Discuss the ways that new diets focusing on meat-eating may have impacted the evolution of the stomach and brain in the genus Homo. Be sure to discuss the timing of these new dietary developments. Be sure to provide a clear review of the evidence that archaeologists have used in order to show changes in our ancestors' diets. In addition, be sure to discuss how dietary changes affected our ancestors' bodies as well as parent-child interactions in the genus Homo. Which statement describes compute nodes in a NetApp HCI appliance chassis? the rottgen pieta was intended to elicit which of the following emotional responses from viewers? Which of the following is a common consequence of inbreeding in a population? a. Increased frequency of heterozygous genotypes b. Increased frequency of homozygous genotypes c. Increased reproductive fitness d. Increased mutation rate The height of a Cocker Spaniel (in centimetres) is known to follow a normal distribution with mean =36.8 cm and standard deviation =2 cm. a) What is the probability a randomly chosen Cocker Spaniel has a height between 36.2 cm and 37.8 cm ? b) What is the probability a randomly chosen Cocker Spaniel has a height of 37.8 cm or more? c) What is the probability a randomly chosen Cocker Spaniel has a height of 37.8 cm or more, given that they are more than 37.4 cm tall? a decrease in variability leads to an increase in what Estimate the average distance between molecules in air at 0.0^{\circ} {C} and 5.00 atm. Which of the following best defines customer satisfaction? a. the relationship between benefits and the sacrifice necessary to obtain those benefits b. a good or service in terms of whether it has met customers needs and expectations c. a customers value of purchases that are of the quality he expects and are sold at prices he is willing to pay d. a purchase that helps obtain a benefit what type of enzyme catalyzes the intramolecular shift of a chemical group? You are the manager of a small steel production firm, operating in a perfectly competitive market. You have information on the market demand for steel and the market supply of steel, where P is the price per ton of steel, and Q is the market output in tons of steel. Moreover, you know that all firms in the industry are identical. Demand: Q=2,00010P Supply: Q=8P160 Total cost function of a typical firm: C(q)=7.5q 2 +500 a) Find the equilibrium price and the equilibrium quantity in the market. b) What is the output supplied by your firm and the profit of your firm? c) Assuming that fixed costs are sunk in the short run, what is the minimum price above which firms would want to stay in business and produce a positive amount of steel (i) in the short run and (ii) in the long run? d) Would you expect to see entry into or exit from the industry (i) in the long run and (ii) in the short run? Explain. Jamilah recently was asked by her manager to plan and conduct a two-days training course on the pedagogy of teaching online students. The training will be delivered in one month time to a group of 40 lecturers from a community college nearby. She is very well versed in online teaching and the supervisor felt that she would do a good job since she recently had attended a refresher course on technology-based training methods. Jamilah started her preparation by observing another senior trainer delivering a similar training course, read through the training materials several times, looked through materials from previous courses conducted by the other trainers and tried to think of some creative activities she could include in the course. Jamilah sat down with the materials on online pedagogy and started to plan for her course. She knew that she would need some notes, so she developed a set of trainer's notes. She even put some of her notes on a handout to give to those she would be training. Jamilah knew that it was important that she be clear, so she practised reading her notes in a clear voice. She also planned to stop periodically and ask if the participants had any questions. The day of the training finally arrived. During her first session, Jamilah noticed that the participants were not paying attention to her presentation. There were no questions being asked and the participants looked bored and distracted. After the presentation, the participants left the room for a break. Jamilah had a feeling that her first presentation was a failure. She wondered if agreeing to deliver the course was a good decision and she dreaded the next one and a half day that she has to go through to complete the training.Questions: a. Based on the scenario above and the principles relating to training design, describe TWO (2) training mistakes that Jamilah as a trainer has committedb. What should Jamilah have done to prevent these mistakes? Provide TWO (2) recommendations that Jamilah could adopt and apply to make her training session more interesting and engaging. c. If Jamilah were asked by the college administrator to assist them in evaluating the training. elaborate on the following: i. The TWO (2) outcomes to be collected from the training and the measurement methods that she could use. ii. The most suitable evaluation design to assess the two-day training